Section Iv Troubleshooting Procedures Operator Troubleshooting Procedures

PROBLEM SYMPTOM/CAUSE

REMEDY

1. Round does not feed

Fouled magazine or pistol Improperly assembled Incorrect loading procedure used

Unserviceable magazine

Clean and lube pistol and magazine Assemble correctly

Load pistol in accordance with instructions in operator's manual

Replace magazine

2. Round does not chamber Dirty or damaged magazine

Obstruction present in chamber and/or bore

Bent or damaged recoil spring, buffer spring, or guide rod. Buffer spring retainer roll pin drift. *

Clean and lube or replace magazine

Remove obstruction, clean and lube chamber/bore

Return pistol to the HK Service Department for service

Always inspect the buffer spring retainer roll pin for drift. If not firmly seated and centered in the guide rod, return to the HK Service Department for replacement.

PROBLEM_SYMPTOM/CAUSE_REMEDY_

3. Slide does not lock Fouled barrel locking block or slide Clean and lube barrel locking block and fully forward slide

Dry component parts or pistol

Damaged or burred slide, barrel locking block, or recoil/buffer spring assembly. Buffer spring retainer roll pin drift. *

4. Pistol does not fire Faulty ammunition Replace ammunition

Little or no sign of firing pin strike Return pistol to the HK Service Depart-(indent) on primer ment for service

5. Slide does not unlock Faulty ammunition, determined by Check bore for obstruction and replace short recoil ammunition

Lubricate pistol in accordance with instructions in operator's manual

Return pistol to the HK Service Department for service

Check for broken or damaged slide, barrel locking block or recoil/buffer spring assembly. Buffer spring retainer roll pin drift. *

Return pistol to the HK Service Department for service

PROBLEM

SYMPTOM/CAUSE

REMEDY

6. Cartridge does not extract Fouled chamber

Ruptured cartridge case in chamber

Clean and lube

Remove ruptured case, clean and lube chamber

Fouled or corroded ammunition Pitted or damaged chamber

Broken or damaged extractor or extractor spring

Replace ammunition

Return pistol to the HK Service Department for service

Return pistol to the HK Service Department for service

7. Operating controls do not function as described in operator's manual

Damaged or improperly assembled component parts

Return pistol to the HK Service Department for service

8. Accuracy degradation

Damaged or missing O-ring

Replace O-ring

Position No. Item Description

3.12 Parts Listing for Mark 23 Pistol

Part No. Position No. Item Description

Part No.

1

extractor

215707

2

extractor spring

215708

3

rear sight retaining screw

215711

4

rear sight, 6.3mm standard (unmarked)

215770

rear sight, 5.5mm (-4)*

215767

rear sight, 5.9mm (-2)*

215768

rear sight, 6.7mm (+2)*

215771

rear sight, 7.1mm (+4)*

215774

rear sight, 7.5mm (+6)*

215783

5

front sight

215721

6

firing pin

215705

7

firing pin spring

215706

8

firing pin block

215709

9

firing pin block spring

215710

10

firing pin retaining pin

986432

11

extractor pin

986432

12

slide

215667

13

barrel

215671

14

O-ring

986429

15

recoil spring guide rod

215724

16

recoil spring retainer

215725

17

buffer spring

215726

18

dual roll pin (buffer spring retainer)

986433

19

buffer spring retainer

215727

20

spring ring

929191

21

washer

215728

22

recoil spring

215729

23

trigger bar, complete

215760

24

trigger bar spring

215734

25

c-clip (decocker)

927062

26

decocking spring

214743

27

decocker

215742

28

roll pin (ejector)

986431

29

ejector

215752

30

sear

215748

31

sear spring

215749

32

sear actuator

215750

33

disconnector

215751

34

sear axle

215753

35 roll pin (right safety lever)

36 right safety lever

37 sear block

38 decocking lockout

39 hammer axle

40 hammer, complete

41 hammer rebound spring

42 hammer strut

43 hammer strut spring

44 insert

45 locking bolt

46 frame

47 safety detent

48 safety detent spring

49 left safety lever

50 decocking lever

51 magazine release pin

52 magazine release spring

53 magazine release

54 slide release spring

55 trigger

56 trigger pin

57 slide release lever, complete

58 magazine housing (12-rd magazine) 58A magazine housing (10-rd magazine)*

59 follower (10 & 12-rd magazine)

60 locking plate (12-rd magazine) 60A locking plate (10-rd magazine)*

61 floor plate (12-rd magazine) 61A floor plate (10-rd magazine)*

62 magazine spring (12-rd magazine) 62A magazine spring (10-rd magazine)*

63 locking insert (molded into frame)

64 trigger guard insert (molded into frame)

65 guiding part (molded into frame) magazine (12-rd with LE markings), complete* magazine (10-rd), complete*

986430

215744 215754

215745

215738 215772

215739

215740

215741

215731

215732 215976

215746

215747 215769 215766 986432 215737 215775

215733

215735

215736 215763

215778

215672

215779

215781 214853

215780

215673

215782 214821

215668 215670

not pictured

Figure 15 Exploded Diagram HK Mark 23 Pistol

Figure 15 Exploded Diagram HK Mark 23 Pistol

Mark Exploded

CHAPTER 4- AMMUNITION

The Mark 23 pistol was designed to operate best using two types of .45 ACP caliber ammunition. They are:

A. M1911 230 grain Ball

B. Commercially Manufactured 185 grain +P Jacketed Hollow Point (JHP)

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