KOMATSU GD610,GD620 SERIES GD660,GD670 SERIES SERVICE REPAIR MANUAL (SEBMG6150109) – PDF DOWNLOAD

SEBMG6150109

GD663A-2

1001 and up

For GD663A-2, see pages prepared for GD623A-1 except two descriptions below.

1) Front axle (page 41-9) 1. Steering cylinder has both types of single cylinder and dual cylinder.

2) For rear mount ripper, see page 74-9. © 2011 7 All Rights Reserved Printed in Japan 08-11(01)

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74- 9

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GD663A-2

Outline • Ripper lifting height and digging depth can be controlled with ripper cylinder (4). Since the point tips cut into the ground under the load of the ripper's heavy weight, the ripper easily performs heavy-duty digging work that cannot be done by the scarifier.

1. Bracket 2. Rod 3. Shank 4. Ripper cylinder

Unit: mm No.

Check Item

Criteria Standard Size

5

Clearance between pin and bushing

50

6

Clearance between pin and bushing

60

7

Clearance between trunnion and bushing

60

8

Point wear

GD610, 620 GD660, 670

Tolerance Shaft

Hole

-0.025 -0.050 -0.030 -0.076 -0.100 -0.174

+0.142 +0.080 +0.054 0 +0.174 +0.100

Remedy Standard Clearance

Clearance Limit

0.105 to 0.192

0.5

0.03 to 0.13

0.5

0.200 to 0.348

0.5

Standard Size

Repair Limit

290

150

Replace

74-9 o

90

OTHERS

Air conditioner ................................................................... 90-2

GD610, 620 GD660, 670

90-1 8

AIR CONDITIONER (if equipped) AIR CONDITIONER PIPING H Type (Refrigerant: for R134a)

SYSTEM DIAGRAM

1.

2.

3.

4.

5.

6.

7.

Air conditioner unit Dry receiver Compressor Condenser Hot water heater Evaporator Blower unit

A. Vent

90-2 8

GD610, 620 GD660, 670

AIR CONDITIONER CONDENSER

1. Refrigerant gas inlet port 2. Fan

3. Connector 4. Refrigerant gas outlet port

AIR CONDITIONER COMPRESSOR

1.

2.

3.

4.

Refrigerant outlet port Refrigerant inlet port Relief valve Clutch

SPECIFICATIONS Type: Piston pump type Refrigerant used: R134a

GD610, 620 GD660, 670

90-3 8

DRY RECEIVER

1. Cap 2. Body 3. Drier

90-4 8

GD610, 620 GD660, 670

ELECTRICAL CIRCUIT DIAGRAM FOR AIR CONDITIONER

GD610, 620 GD660, 670

90-5 8