Heckler And Koch HK SL8-1 Operators Manual

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TROUBLESHOOTING GUIDE
40TROUBLESHOOTING GUIDEStoppages and Malfunctions
In the event of stoppages on the SL8-1, the weapon is to be considered
loaded until the actual cause of the stoppage has been determined.
During the elimination of stoppages, safety precautions are to be taken
into account.
If in the event of stoppages on the SL8-1, the cartridge fired from the
SL8-1 is not ignited; the bolt assembly does not close completely; or the
spent cartridge case is not ejected; then the following steps must be
taken immediately
1 • Put the SL8-1safety/selector lever on “Safe”
2 • Remove the magazine
3 • Unload the SL8-1
4 • Ensure that barrel, cartridge chamber and receiver are free
of obstacles
5 • Determine and eliminate the cause of the stoppageStoppage, Fault Cause Remedy
Cartridge is not ignited Ammunition fault (dud) Recock SL8-1 
(dud round)
Tip of firing pin damaged Contact HK for repair
or broken
Hammer spring damaged Contact HK for repair 
or broken
Bolt fails to open Cartridge case stuck in Unload: retract bolt to  
after being fired chamber due to deform- eject cartridge case,
ation or dirty chamber clean if fouled. If 
required, contact HK 
for repair
Gas system fouled or Clean gas piston.
defective  If required, contact HK 
for repair
Bolt does not close   Cartridge chamber dirty Clean chamber 
completely, cartridge
not properly seated Barrel extension dirty Clean barrel extension
Cartridge damaged Replace cartridge
Recoil spring worn Contact HK for repair
Incomplete cocking Release cocking lever.
movement Let it snap forward 
without riding it forward.
Stoppage, Fault Cause Remedy
Cartridge case not  Chamber dirty Clean chamber
extracted or ejected
Extractor or or extractor Contact HK for repair
spring broken
Ejector or ejector  Contact HK for repair 
spring damaged
Insufficient bolt recoil Unload: Use cocking 
lever to retract bolt.
Remove cartridge case.
Check for smooth 
operation and check 
chamber for fouling.
If required, clean 
chamber.
No cartridge fed by bolt Magazine not properly  Insert magazine properly
inserted or engaged.
Magazine loose Check magazine catch 
and lugs on magazine
housing. If required, 
contact HK for repair.
Follower spring worn Replace or repair 
magazine
Magazine lips damaged Magazine housing 
damaged. If required
contact HK for repair.
Magazine well damaged Return magazine well to 
HK for repair
Bolt does not stay open  Magazine follower Replace magazine
after last shot spring worn follower, or springSL8-1 trigger cannot be Sear broken or  Contact HK for repair
pulled with hammer compression spring 
cocked wornMagazine stuck in  Magazine damaged Replace magazine
magazine well
Magazine catch Contact HK for repair
defective 
						

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PARTS LIST & EXPLODED DIAGRAM 
42PARTS LIST & EXPLODED DIAGRAMItem Description Part Number
Rifle, SL8-1 complete 219-477
1 Housing 219-479
Barrel, complete (2-5) 217 906
2 Barrel 217 907
3 Barrel retaining nut 205 378
4 Gas block 217 919
5 Roll pin, gas block 927 605
6 Piston, complete 205 381
7 Piston rod, complete 205 384
8 Mounting Rail 217 947
9 Flat Headed Screw (3x) 986-785
10 Washer (3x) 214 112
11 Threaded Washer 214  113
Front sight, complete (12-14) 217 933
12 Front sight 217 796
13 Front sight base 217 795
14 Roll pin, front sight 928 747
15 Flat headed screw (4x) 988 428
Rear sight complete (16-24) 217 925
16 Roll pin, rear sight 987 695
17 Rear sight guard 217 992
18 Spring, elevation adjustment 217 504
19 Rear sight housing 217 991
20  Rear sight aperture 217 997
21 Spring, windage adjustment 217 518
22 Flat Spring 217 515
23 Screw, elevation adjustment 217 505
24 Screw, windage adjustment 217 517
Bolt complete (25-42) 219 560
Bolt head, complete (25-32) 219 561Item Description Part Number
25 Bolt head 219 562
26 Extractor axle 214 644
27 Extractor 205 406
28 Extractor spring 205 407
29 Rubber pin for extractor 214 662
30 Roll pin 928 389
31 Ejector 205 408
32 Spring, ejector 205-411
Bolt head carrier complete (33-38) 217-909
33 Spring, cocking handle 205 393
34 Fork 205 394
35 Bushing 205 473
36 Cocking handle 205 395
37 Rivet 205 210
38 Bolt carrier 217 910
39 Cam Pin 205 390
Firing pin retainer, complete (40-41) 205 412
40 Firing pin retainer 205 413
41 O-ring, firing pin retainer 983 411
42 Firing pin 205 391
43 Recoil spring complete 205 445
Buttstock assembly complete (44-76,79)219 535
44 Screw for check rest (2x) 988 372
45 Cheekpiece 217 948
46 Cheekpiece spacer 217 916
47 Buttstock 219 538
48 Spacer, Buttplate 219 537
49 Buttplate complete 219 539
50 Allen Screw, Buttstock (4) 217 903
51 Back plate 219 536
Figure 45
SL8-1 Rifle
Caliber .223
Item Description Part Number
52 Buffer 205 452
53 Hammer spring, right 205 428
54 Hammer 217 936
55 Hammer spring, left 205 429
56 Notched disk 217 614
57 Index plate 205 419
58 Compression spring 205 418
59 Sear complete 205 439
59a Slide 219 411
60 Sear spring 217 917
61 Trigger spring 217 918
62 Trigger 217 934
63 Bolt catch spring 205 466
64 Bolt catch 214 879
Locking lever, complete 219 094
65 Locking lever spring 214 616
66 Locking lever 219 095
67 Bolt 214 615
68 Locking lever 214 613
69 Elbow spring, right 217 946Item Description Part Number
70 Elbow spring, left 205 201
72 Safety lever, right 205 437
73 Safety lever, left 217 945
74 Recessed axle 205 202 
75 Clamping pin 988 371
76 Axle (3x) 205 469
77 Actuator axle 205 424
78 Magazine release spring 205 369
79 Magazine release 205 368
80 Axle 205 469
81 Magazine well 219 478
82 Locking pin, complete (2x) 214 125
83 Hand guard complete 219 551
Magazine complete (10 rounds) 219 472
83 Magazine Housing 219 473
84 Follower 219 474
85 Follower spring 219 475
86 Magazine floor plate 219 476
HK Combination Tool 988 49  
						

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FIREARM SERVICE RECORD
44SL8-1 SPECIFICATIONS
SL8-1 Rifle    Serial Number ___________________________________
Number of Cumulative Total Maintenance & 
Date Rounds Fired of Rounds Fired Users Name Remarks
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Caliber .223 Remington
Operating Principle Gas operated, short stroke piston, rotary
locking bolt
Mode of Fire Semi-automatic
Feed Device Single-stack polymer magazine, 
10-round capacity
Sights Adjustable iron sights. and detachable MIL-
STD-1913 rail available for the attachment of
accessory targeting devices
Rifling 6X lands & grooves, right hand twist, 
I turn in 7 inches
Length (overall) 38.58 inches (980 mm) 
Barrel Length 20.80 inches (528 mm)
Sight Radius 17.65 inches (448 mm)
Width (overall) 2.36 inches (60 mm)
Height (overall) 9.84 inches (250 mm) with 10-rd magazine 
Weights
• Overall 8.60 pounds (3.9 kilograms with magazine)
• Magazine 2.47 oz. (70 grams) 10-round, empty 
						

							46 
						

							In a world of compromise, some don’t.Heckler & Koch, Inc.
21480 Pacific Blvd.
Sterling, Virginia  20166-8903 
United States of America
Tel. (703) 450-1900
Fax (703) 450-8160
www.hecklerkoch-usa.comHeckler & Koch GmbH
D-78722 Oberndorf/Neckar  
Postfach 1329
Germany
Tel. 011-49-7423/79-0
Fax 011-49-7423/2280
www.heckler-koch.de
HK USA #701475   5/00 
®
Remember, firearms safety begins with you. Read and follow all safety information in the
operators manual. Store all firearms in a safe and secure location. Keep firearms away from
children. Always be a safe shooter.