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FIELD SERVICE MANUAL
Model bOX
INTRODUCTION
The Remington "Rangemaster" Model ^OX is a bolt action
22 caliber match rifle. This rifle is of single shot solid frame
design chambered for long rifle cartridge only. The gun action
is hand operated and similar in function with most rifles of the
bolt action type.
In addition to the detailed assembly instructions, design
information will also be included to better acquaint the reader
with the purpose of each part.
A sectional view is included as a final page to assist
in the proper identity of components.
Model 40X
INDEX OF ASSEMBLY FIELD SERVICE MANUAL
Page 1
The paragraph headings for the ASSEMBLY section are
arranged in the most practical working order. This order , if
followed as numerically listed, will remove and replace the parts
in their proper order. Components not listed in this index will
be found in the detailed instructions.
1. BOLT ASSEMBLY Page 2-3
2. BOLT ASSEMBLY - COMPONENTS 4-8
3. BARREL ASSEMBLY 8-9
4. BARREL ASSEMBLY - ACTION GROUP 9-10
5. TRIGGER ASSEMBLY - COMPONENTS 11 - 13
6. TRIGGER ADJUSTMENT 13 - l4
7. STOCK - STOCK ASSEMBLY 15
8. STOCK ASSEMBLY - COMPONENTS 15 - 16
9. BEDDING ESCUTCHEON ASSEMBLY - COMPONENTS 16
10. SIGHTS 17
A design relationship exists between the Model 40X and
the Models 721-722. The safety action, the cocking of the firing
pin, and the engagement of components (to some extent) which affect
the trigger pull, operate in a similar manner. A number of components,
identified with these functions, carry the same part number in the
Parts Price List.
FIELD SERVICE MANUAL
Model 40X
ASSEMBLY
Page 2
CAUTION; Make certain no cartridge is in barrel
before handling®
1® BOLT ASSEMBLY;
This assembly is designed to close and lock the action
securely to the barrel breech against the chambered round®
The loading, firing and extracting mechanism is carried
within this part®
Push safety forward to "FIRE" position (Bolt handle will not
raise if safety is in rear or "ON SAFE" position®)
Raise bolt handle and pull bolt assembly rearward®
Press upward on bolt stop release located in front of trigger®
See sketch below.
Continue pulling bolt assembly rearward and disassemble from
receiver of rifle.
The bolt assembly is factory listed to include the bolt body
assembly, firing pin assembly, bolt head, bolt pin (2),
extractor, left$ extractor, rights extractor plunger (2),
extractor spring (2).
Model bOX
ASSEMBLY
FIELD SERVICE MANUAL
Page 3
lo BOLT ASSEMBLY? (Continued)
NOTE? Normal removal of the bolt assembly from the rifle will
retract or draw back the firing pin. The firing pin head,
pinned to the rear of the firing pin will then hold the firing
pin in a retracted position. The bolt assembly can not be
replaced to rifle unless the firing pin is in this retracted
position. See sketch below.
If firing pin has been released forward for some reason, with
the bolt assembly removed from the rifle, it may be retracted
in the following manner...
Hold flat under section of firing pin head tightly
in a vice jaw, then...
Simply raise bolt handle upward. This movement of
the handle will cam the bolt body forward and permit
the retraction of the firing pin to a notched position
on the rear under rim of the body assembly.
IMPORTANT; Bolt assemblies are numbered on under surface to
match the rifle number. Close headspace and firing pin indent
measurement limits require precision assembly of bolt assembly
components. Therefore, any replacement of the bolt assembly
requires careful assembly to maintain proper headspace and firing
pin requirements.
FIELD SERVICE MANUAL
Model ^OX
ASSEMBLY
Page 4
. BOLT ASSEMBLY - COMPONENTS:
(With bolt assembly removed from rifle)
Firing Pin Assembly - is designed as a spring powered striker
to indent the cartridge primer and explode the round. To
disassemble from bolt assembly, , ,
Pull back or retract firing pin head from bolt plug until
coin or similar flat tool can be wedged between firing pin
head and bolt plug. See sketch below.
Hold firing pin head in this retracted position and unscrew bolt
plug from bolt body assembly.
Pull out and disassemble firing pin assembly from bolt body
assembly - bolt head, NOTE: Bolt head will revolve when firing
pin is withdrawn,
NOTE: The firing pin assembly - is factory listed to include
bolt plug, firing pin, firing pin cross pin, firing pin head,
main spring.
Reassemble in reverse order. Take care that firing pin aligns
properly in hole in front of bolt head.
Firing Pin Assembly - Components'
(With assembly disassembled from bolt assembly)
Firing Pin Head - is designed to "retract" the firing pin
and notched to hold "cocked" against the upthrust sear.
To disassemble,,.
Pull back and hold firing pin head against compressed main
spring ,
Model bOX
ASSEMBLY
Page 5
FIELD SERVICE MANUAL
2© BOLT ASSEMBLY - COMPONENTS; (Continued)
(With bolt assembly removed from rifle)
Firing Pin Head (Continued)
Drive out firing pin cross pin visible in side of retracted
firing pin head©
Disassemble tightly fitted firing pin head from rear shank of
firing pin©
Release pressure on retracted main spring.
Bolt Plug - is designed to screw up and hold firing pin assembly
properly assembled to bolt assembly©
Main Soring - is designed to place the firing nin under tension
for firing the round©
Firing Pin - is designed to indent the primer and fire the
chambered round®
All of the above listed components of the firing pin assembly
will be freed as the firing pin head is disassembled, and can
be separated© See sketch below®
MAIN SPRING
BOLT PLUG
FIELD SERVICE MANUAL
Model ^-OX
ASS EMBLY
Page 6
2. BOLT ASSEMBLY - COMPONENTS: (Continued)
(With bolt assembly removed from rifle)
Firing Pin - (Continued)
Reassemble in reverse order - with the firing pin head
holding all components assembled as a firing pin assembly#
IMPORTANT: A replacement firing pin must be free fitting
within the bolt assembly and correct protrusion limits
(Maximum #036" - Minimum .031”) maintained to produce the
proper indent on the round. The firing pin is factory listed
to include three (3) components; firing pin point, firing pin
body and firing pin shank. All three components are copper
brazed under rigidly controlled factory processes for proper
assembly. Factory replacement as a unit is recommended.
Bolt Body Assembly - is designed as the middle section of the
bolt assembly to provide the opposed locking lugs, and handle
to operate the bolt action.
(With firing pin assembly removed)
Drive bolt pin (2) from locking lugs (2) on bolt body assembly.
Pull away and disassemble bolt body assembly from bolt head.
See sketch below®
The bolt body assembly includes the bolt body and bolt handle©
The components are riveted and copper brazed under rigidly
controlled factory processes to form the assembly. Replacement
as an assembly is recommended®
Reassemble in reverse order®
Model 40X
ASSEMBLY
Page 7
FIELD SERVICE MANUAL
2o BOLT ASSEMBLY - COMPONENTS; (Continued)
(With bolt assembly removed from rifle)
Bolt Head - is designed as the front section of the bolt assembly
to breech up the chambered round to the barrel and contain the
opposing extractors which grip the rim and guide the extracting
and. ejecting rounds
Bolt Head - will be free and can be disassembled from the bolt
assembly when the bolt body assembly is disassembled (See BOLT
BODY ASSEMBLY).
IMPORTANT; Replacement of the bolt head requires careful
breeching to meet proper headspace limitations between the face
of the closed and locked bolt and the chamber rim ( e 0 l f2" to
.045”). See sketch below.
FIRING PIN
Protrusion of the firing pin to established limits, (.031" to
.036") for proper indent on the primer of the chambered round,
must also be checked when a bolt head is replaced (See Firing
Pin) o
Reassemble bolt head to bolt body assembly in reverse order.
Extractors, Right and Left - are designed to extract and assist
in the ejection of the fired or unfired round.
Force extractor plunger rearward in bolt head and away from
rear shoulder of extractor.
Pry up and raise rear of extractor from slot in bolt head.
Pivot extractor in slot and disassemble from bolt head.
FIELD SERVICE MANUAL
Model 40X
ASSEMBLY
Page 8
2® BOLT ASSEMBLY - COMPONENTS: (Continued)
(With bolt assembly removed from rifle)
Extractors® Right and Left - (Continued)
NOTE: The shape of the extractor, right, is more claw like
than the extractor, left. The extractor, left, is shaped to
maintain tension against the opposing grip of this clawlike
extractor, right.
Reassemble extractors in order. Replacement extractor may
require a tightening adjustment for proper tension against
the round. Carefully remove steel from the middle pad of
right extractor. See sketch above®
3. BARREL ASSEMBLY:
( (With trigger assembly attached)
This basic model assembly is factory listed to include only
the barrel, barrel bracket and receiver.
Trigger Guard - is designed as the name Implies, to serve
as a guard for the trigger and is not a component of the
barrel assembly.
Unscrew all three (3) guard screws 5 rear, middle and front.
Disassemble from stock.
Lift loosened trigger guard and disassemble from stock.
Disassemble loosened barrel assembly from stock assembly.
NOTE: The trigger guide -plate underlies the trigger guard
in the stock and can be lifted freely from position after
the trigger guard is removed.
Model 40X
ASSEMBLY
FIELD SERVICE MANUAL
Page 9
3o BARREL ASSEMBLY; (Continued)
Trigger Guard (Continued)
Reassemble in reverse order* NOTE; Settle barrel bracket well
back against recoil slot in stock and tighten front guard screw
first* Replacement barrel assembly may require rebedding to
"float" free of wood contact*
4* BARREL ASSEMBLY - ACTION GROUP;
(With bolt and stock assemblies removed)
E.i ector - is designed to trip the extracting round from the
grip of the extractors and eject the round from the port*
The ejector also serves as a loading platform*
Unscrew ejector screw and disassemble from under surface of
receiver*
Lift and disassemble ejector from receiver*
Reassemble in reverse order. NOTE; Position bolt "closed"
in receiver when reassembling ejector*
Receiver Filler Piece - is designed to assist in the proper
loading of the round*
(With ejector removed)
Tip receiver filler piece from rear and disassemble from
receiver*
Dislocate and disassemble r eceiver filler spring from inner side
of receiver filler piece, if desired.
Reassemble in reverse order*
Trigger Assembly - is designed to house the "fire control"
components*
Push out sear pin, left to right, to prevent binding against
front of bolt stop*
Push out bolt stop pin (longest pin)*
NOTE; Sear- safety cam assembly * and sear spring will be loose
in trigger assembly when trigger assembly is disassembled from
receiver*
FIELD SERVICE MANUAL
Model 40X
ASSEMBLY
Page 10
BARREL ASSEMBLY - ACTION GROUP: (Continued)
(With bolt and stock assemblies removed)
Trigger Assembly - (Continued)
Push out and disassemble trigger assembly from receiver*
Replace both pins to hold sear and safety cam assembled to
trigger assembly before reassembly, if desired. Replacement
assemblies, when received, will be supplied with so called
"slave” pins. The bolt stop and sear pins will replace these
pins when assembled to receiver.
Bolt Ston and Bolt Stop Spring - are designed to stop the
rearward stroke of the bolt after ejection.
(With trigger assembly removed)
Pull out and disassemble bolt stop and bolt stop spring
from receiver.
Reassemble in reverse order. Check components for free play
in receiver. Stake sear pin and bolt stop pin tightly to
receiver.
Barrel - Receiver - is screwed very tightly to the barrel.
IMPORTANT: Any replacement of barrel or receiver requires
correct head spacing to the barrel and face of closed bolt.
Proper alginment of barrel bracket is required.
Unscrew receiver and disassemble from barrel. NOTE: Close
fitting holding jaws should be used to prevent damage to
barrel or receiver.
Barrel Bracket - is designed as a lug to transfer the recoil
of shooting to the stock.
Slip barrel bracket rearvrard and disassemble from breech of
barrel after receiver has been removed.
Reassemble parts in reverse order.
IMPORTANT: The extractor cuts of the assembled and closed bolt
must be aligned to the matching cuts in the barrel, when
barrel is assembled.
Headspace - limits between the face of the closed bolt and
the cartridge rim cut ofthe barrel chamber are listed as
.045" max. - .042" min. (See sketch Page 7)®
Model 40X
ASSEMBLY
FIELD SERVICE MANUAL
Page 11
5 ® TRIGGER ASSEMBLY - COMPONENTS?
The trigger assembly is factory listed to include the bolt
stop pin, bolt stop release, connector, safety, safety detent
ball, safety detent spring, safety pivot pin, safety snap
washer, safety cam-sear assembly, sear pin, sear spring,
trigger, trigger adjusting ball, trigger adjusting screw,
trigger housing assembly, trigger pin, trigger spring, trigger
stop screw, (2),
(With trigger assembly removed from receiver)
Sear and Safety Cam - are designed as a matched unit to
hold back the firing pin in "cocked" position and be supported
from beneath in this position by the connector,, The safety
cam section of the unit also holds back the firing pin and is
supported from beneath in this position by the safety® (See
sketch below)® Reassemble in reverse order® (See note bottom
Page 9 ® )
FIRING PIN
Safety - is designed to support the safety cam from beneath
when the safety cam is holding back the firing pin in the
"Cocked" position® This rearward support position of the safety
to the safety cam represents the "ON SAFE" condition of the
rifle®
FIELD SERVICE MANUAL
Model 4-OX
ASS EMBLY
Page 12
5® TRIGGER. ASSEMBLY - COMPONENTS: (Continued)
Safety - (Continued)
Pry and slide safety snap washer free of safety pivot pin
and disassemble from trigger housing assembly,,
Lift and disassemble loosened safety detent spring from safety
pivot pin and safety*
Lift or shake out safety ball and disassemble from trigger
housing assembly®
Push out safety pivot pin and disassemble from trigger housing
assembly® (Note flanged head on left side)*
Lift out and disassemble loosened safety from trigger housing
assembly.
Disassemble bolt stop release from loosened position on trigger.
Reassemble in reverse order.
Trigger Adjusting Screw - is designed to adjust the weight
'(travel), of trigger pull.
Unscrew and disassemble trigger adjusting screw from trigger
housing assembly (bottom).
Shake out and disassemble trigger adjusting ball from trigger
housing assembly.
Pull out and disassemble trigger spring from position in
trigger adjusting ball hole in front of trigger housing assembly.
Trigger Stop Screw (2) - is designed to adjust the engagement
surface of the connector to the sear® (See TRIGGER ADJUSTMENT)®
Break seal (Du Pont cement), unscrew and disassemble trigger
stop screw from front section of trigger housing assembly.
Disassemble trigger stop screw in like manner from rear section
of housing.
Model 40X
ASSEMBLY
FIELD SERVICE MANUAL
Page 13
5o TRIGGER ASSEMBLY - COMPONENTS t (Continued)
Connector - is designed to translate the pulling of the trigger
to the release of the sear.
Slide out loosened connector from top of trigger housing
assembly.
Trigger - is designed to manually fire the rifle®
Drive out trigger nin and disassemble trigger from trigger
housing assembly®
NOTEs The only remaining part of the trigger assembly after
all of the above components have been disassembled, is the
trigger housing assembly® This remaining assembly part is
factory listed to include five (5) components, the trigger
side -plate (2) and the trigger housing spacer (3)® Special
factory brazing processes are required in the assembly®
Replacement as a unit is required.
Reassemble in reverse order. Replacement parts require
adjustment (See TRIGGER ADJUSTMENT below). All components
making up the trigger assembly must be reassembled before the
trigger assembly is reassembled to the receiver. Bolt assembly
must also be reassembled to the rifle before any adjustment
can be made.
6. TRIGGER ADJUSTMENT? (Follow directions in order with bolt in
rifle - stock removed)
Travel of Trigger - Engagement of under surface of sear to the
connector may be observed through hole in trigger housing assembly®
(Firing pin will fall or "follow down" if no engagement is made).
The supporting surface of the connector, engaging the sear may
be increased by screwing out the trigger stop screw in rear
of trigger housing assembly.
The supporting surface of the connector, engaging the sear may
be decreased by screwing in the trigger stop screw in rear of
trigger housing assembly®
F I ELD SERVICE MANUAL
Model 40X
ASSEMBLY
Page 14
6. TRIGGER ADJUSTMENT: (Follow directions in order ) (Continued)
Travel of Trigger - (Continued)
A simple way - screw in trigger stop screw at rear of trigger
housing assembly until firing pin will fall without trigger
being pulled® Then screw back trigger stop screw approximately
1/8 turn or until firing pin will not fall unless trigger
is pulled® Visual engagement of sear to connector should
show approximately .010" (no creep)® (See enlarged sketch
below) ®
Overtravel of Trigger - sometimes called overdraw of trigger
after rifle has fired, may be lessened by screwing in the
trigger stop screw at front of trigger housing assembly®
A simple way - screw in trigger stop screw in front of trigger
housing assembly until firing pin will not fall while pulling
trigger® Continue pulling trigger and screw out trigger stop
screw until firing pin will fall ® Then screw out trigger stop
screw a fraction more® No perceptible overtravel should be felt®
Reseal both trigger stop screws® Proper staking of rear screw
or cement seal or both, necessary to insure no change or "working
out" of adjustment®
Weight of Pull - may be increased by screwing in the trigger
adjusting screw®
- may be decreased by screwing out trigger
adjusting screw®
NOTE: Trigger adjusting screw is located at bottom of trigger
housing assembly and can be adjusted with rifle completely
assembled® The weight of pull is adjusted at the factory for
3 to pounds®
Model bOX
ASSEMBLY
Page 15
FIELD SERVICE MANUAL
7® STOCK - STOCK ASSEMBLY?
The stock is designed as a wood member to carry and hold the
barrel and action when firing®
Unscrew and disassemble all three guard screws, rear, middle and
front •
Disassemble loosened trigger guard from stock®
Remove stock from barrel and action.
Remove trigger guide plate which underlays the trigger guard®
The stock is factory listed to include the stock, butt pad and
butt pad screw (2)® Also supplied, is an alternate replacement
unit, the "STOCK ASSEMBLY." This unit is factory listed to
include the stock, butt pad, butt pad screw (2), bedding
escutcheon assembly (2), front swivel assembly and front swivel
base screw (2). NOTE? The stock alone x^ithout butt pad or
screws is not supplied®
Reassemble stock in reverse order. Barrel should "float"
in stock and have approximately .010" clearance from wood®
When replacing stock, specify standard or heavy barrel type®
8® STOCK ASSEMBLY - COMPONENTS?
(With stock removed from rifle)
Butt Pad - Unscrew butt pad by reaching into open hole (2)
in rear of pad®
Disassemble butt pad from stock®
Reassemble in reverse order® Replacement of butt pads should
show tight fit and slight rubber rather than wood margin®
Front Swivel Assembly - is designed to adjust and hold the
position of the shooting sling®
Unscrew front swivel screw and disassemble front swivel ® front
swivel bushing ® front swivel block , front swivel washer from
front swivel base in stock®
Reassemble to front swivel assembly in reverse order®
FIELD SERVICE MANUAL
Model 40X
ASSEMBLY
Page 16
8. STOCK ASSEMBLY - COMPONENTS: (Continued)
(With stock removed from rifle)
Front Swivel Base - is designed to position the front swivel
in desired location.
Unscrew front swivel base screw (2) and disassemble base and
front swivel nut from stock. Use care to prevent wood split
as nut is tightly fitted. Reassemble in reverse order.
Bedding Escutcheon Assembly - is designed to contact barrel,
if desired, and control vibration when shooting.
Tap out or drive toward, the barrel groove in the stock, and
disassemble the bedding escutcheon assembly (2) from the
stock.
Reassemble in reverse manner making sure that large diameter
of the assembly seats below the wood surface in the barrel
groove.
9. BEDDING ESCUTCHEON ASSEMBLY - COMPONENTS:
This assembly is factory listed to include the bedding escutcheon,
bedding sprew, bedding detent ball, bedding detent spring.
(With assembly removed from stock)
Unscrew bedding screw from bedding escutcheon part way until. . .
Bedding ball can be disassembled from a spring tensed position
against the knurl of the bedding screw. Use care to prevent
losing bedding ball when bedding screw is backed out of bedding
escutcheon.
Bedding screw - can then be unscrewed completely from the
bedding escutcheon and disassembled from the escutcheon.
Bedding detent spring - can be picked from recess in thread
of bedding escutcheon after bedding screw and bedding detent
ball have been disassembled.
Reassemble in reverse order. When reassembling bedding detent
ball, hold ball down against spring until bedding screw will
cover same. Use small drill or rod against ball from small
hole opposite, in large diameter of escutcheon. Bedding screw
should be returned flush or below surface of large diameter
on bedding escutcheon.
Model 40X
ASSEMBLY
Page 17
FIELD SERVICE MANUAL
10. SIGHTS?
Standard Barrel S2 - is furnished without sights,, However ,
sighting equipment on the S2 includes telescope base, frontf
telescope base, rear 5 telescope base screw (4). Receiver plug
screw (6) are also included, two are screwed into position near
the muzzle of the barrel 5 four are screwed to the receiver, two
on left rear of receiver and two on top front of receiver
Heavy Barrel H2 - is also furnished without sights . Sighting
equipment on the H2 includes same as S2 except a shorter
height telescope base, front, is used to keep the same receiver
alignment. This, of course, means a shorter telescope base
screw is used.
Standard Barrel SI - is furnished with Redfield. Olympic sightsf
Redfield- front sight Wo. 1 with ten (10) inserts or sighting
apertures, and Redfield receiver sight. Both Redfield sights
have their own bases that replace the receiver plug screws, at
muzzle and rear left side of receiver. Both sights may be
disassembled from their respective base. For ''shipment", new
guns from the factory are packaged with the Redfield sights
dismounted from their base on the rifle.
Heavy Barrel HI - is also furnished with Redfield Olympic
sights identical with the type on the SI except for the
variation in height to keep the same sight line at the receiver®
Telescope Bases - are furnished on all model types, standard
or heavy barrel, and with or without Redfield sights®
The rear telescope base is assembled to the rear position on
the receiver when the rifle is shipped. This rear position
arrangement for "wide base" location of the telescope, requires
six (6) adjusting clicks of the telescope to change the center
of impact one inch on the 100 yard target®
With the rear telescope base moved to the front, "close base"
position on the receiver, four (4) adjusting clicks are required
to change the center of impact one inch on the 100 yard target.
Model bOX
FIELD SERVICE MANUAL MALFUNCTIONS
Page 18
Malfunctions occuring in the Model *+0X are listed mainly
in relation to the action of the bolt assembly,, Listed below is an
index of probable malfunctions and a suggested method of correction®
1® BOLT FAILS TO ASSEMBLE.
2. BOLT CLOSES HARD.
3® BOLT FOLLOWS DOWN (Uncocks)®
b . BOLT MISFIRES.
5® BOLT FAILS TO EXTRACT.
6® BOLT OPENS HARD.
7. BOLT FAILS TO EJECT.
8. BOLT PULLS OUT.
9. SAFETY FAILS.
10® TARGET - GROUP FAULT®
11. TARGET - CENTER OF IMPACT FAULT.
Instruction Folders, supplied with each new gun,
advise as to proper maintenance and care of the rifle® Additional
copies are available from the factory upon request®
Model 40X
MALFUNCTIONS
FIELD SERVICE MANUAL
Page 19
1. BOLT FAILS TO ASSEMBLE
Cause ;
a, Bolt uncocked o
bo Bolt stop damaged,
Co Bolt head rotated slightly out of position,
d® Receiver filler piece binds bolt®
Correction s
a. Cock bolt. See BOLT ASSEMBLY,,
be Replace or adjust. Check bolt stop release,
Co Re-position bolt head radially,
d e Depress receiver filler piece into receiver*
2, BOLT CLOSES HARD
Cause s
a„ Rough chamber,
b. Rough cam in receiver,
Co Bolt lugs damaged,
do Too little headspace, (,0^2" Min,, o 0 1 +5" Max,)
e. Extractor cut in barrel damaged©
Correction s
a. Repolish (lightly) or replace barrel,,
b. Smooth up cam or replace receiver®
c. Smooth up bolt lugs or replace bolt body assembly,
d. Adjust headspace or replace barrel©
e. Clear up damage or replace barrels
9, BOLT FOLLOWS DOWN (Uncocks )
Causes
a© Engagement of sear to connector lacking or
insufficient to hold.
FIELD SERVICE MANUAL
Model 40X
MALFUNCTIONS
Page 20
BOLT FOLLOWS DOWN (Uncocks) (Continued)
Cause ; (Continued)
b. Trigger fails to retract,,
c. Sear damaged.
d. Connector damaged.
e. Sear and connector sticky.
Correction ; (See ASSEMBLY - TRIGGER ADJUSTMENT)
a. Adjust engagement in trigger assembly.
Adjust in trigger assembly or replace.
Replace sear and safety cam assembly (matched set).
Replace connector.
Clean components.
b«
C c
d,
e,
4. BOLT MISFIRES
Cause;
ct o
b.
C 0
d.
e.
Correction ;
S, 0
b.
C 0
Firing pin short, damaged.
Firing pin binds in bolt assembly - light firing
pin blow.
Trigger assembly faulty.
Main spring damaged.
Ammunition faulty.
Replace firing pin - check protrusion carefully.
Free up travel of firing pin or replace. Clean
components.
Adjust trigger assembly (See ASSEMBLY - TRIGGER
ADJUSTMENT).
d. Replace main spring.
e. Discard ammunition.
Model 40X
MALFUNCTIONS
FISLD SERVICE MANUAL
Page 21
!
!
1® BOLT FAILS TO EXTRACT
NOTE; Make certain safety is in forward or "FIRE" position®
Bolt handle will lock down in rear or "ON SAFE" position®
Cause ;
a® Extractor (right) damaged or missing®
b® Extractor (right) grip on cartridge faulty®
c® Extractor slots in barrel damaged, shallow®
d» Rough or damaged chamber,
e® Fired cartridge bulged at base®
Correction ;
a® Replace extractor, right.
b. Adjust hook space on cartridge® Remove some metal
from middle pad on extractor® Check extractor
plunger and spring®
c® Repair extractor slots or replace barrel®
d® Repoll sh chamber - use caution ® Do not exceed
chamber dimensions.
e® Check headspace or replace barrel®
6® BOLT OPENS HARD
Cause ;
a® Extraction faulty.
b® Extraction cam on base of bolt handle damaged®
c® Filler piece damaged, defective®
d® Trigger guard screws protrude into bolt track®
e® Telescope base screws protrude into bolt track®
f. Wood interferes with bolt handle®
FIELD SERVICE MANUAL
Model 40X
MALFUNCTIONS
Page 22
6. BOLT OPENS HARD (Continued)
Correction ;
a 8 See FAILS TO EXTRACT.
b. Repair or replace bolt body assembly.
c. Adjust or replace filler piece.
d. Shorten length of guard screws.
e. Shorten length of telescope base screws.
f. Provide proper clearance for bolt handle.
7. BOLT FAILS TO EJECT
Cause ;
a. Ejector (loading platform) damaged, loose.
b. Cartridge loose under extractors.
c. Extraction faulty.
Correction ;
a. Replace or tighten ejector.
b. Adjust grip of extractors to cartridge. Check
retraction of firing pin.
c. See FAILS TO EXTRACT.
8. BOLT PULLS OUT
Cause ;
a. Bolt stop damaged.
b. Bolt stop release damaged.
c. Bolt stop binds down.
Correction ;
a. Adjust or replace bolt stop.
b. Adjust or replace bolt stop release.
c. Replace bolt stop spring. Remove burrs, if any.
Clean components.
Model 40X
MALFUNCTION
FISLD SERVICE MANUAL
Page 23
9. SAFETY FAILS
Cause s
a, Safety binds 0
bo Safety loose®
Co Safety damaged®
Correction ;
a® Remove stock, adjust operation of safety®
b® Remove stock, check safety snap washer®
c® Remove stock, replace safety®
10® TARGET - GROUP FAULT
Cause ;
a® Cartridge chamber worn long, defective®
b® Firing pin indent faulty®
Co Barrel bore or muzzle damaged®
d® Barrel bedding faulty,
e® Sights defective, loose®
Correction ;
a® Replace barrel (check headspace to bolt)®
b® Adjust or replace firing pin®
Co Lead or replace barrel. Check for muzzle damag
d® Adjust bedding of barrel to stock® Tighten
front and rear trigger guard screws®
e® Adjust or replace sights®
FIELD SERVICE MANUAL
11 o TARG ET - CENTER OF IMPACT FAULT
Caus e :
a. Barrel crooked.
b. Barrel bore or muzzle damaged.
c. Sights faulty.
Correction s
a. Replace or straighten barrel. IMPORTANT s (Check
headspace to bolt, if replacing).
b« Replace barrel, lead bore, repair or recrown
muzzle.
Co Adjust or replace sights.
Model 40X
MALFUNCTIONS
Page 24
Model 4-OX
SECTIONAL VIEW
Page 25
FIELD SERVICE MANUAL