00-1
SEBM035005
© 2007
All Rights Reserved
Printed in Japan 11-07 (01)
(5)
MACHINE MODEL SERIAL NUMBER
D31EX-21
50501 and up
D31PX-21
50501 and up
D37EX-21
5501 and up
D37PX-21
5501 and up
D39EX-21
1501 and up
D39PX-21
1501 and up
•
This shop manual may contain attachments and optional equipment that are not available
in your area. Please consult your local Komatsu distributor for those items you may
require. Materials and specifications are subject to change without notice.
• D31, D37, D39EX, PX-21 mount the SAA4D102E-2 engine.
For details of the engine, see the 102 Series Engine Shop Manual.
00-2
D31/37/39EX, PX-21
GENERAL
(1)
CONTENTS
No. of page
01 GENERAL ................................................................................................................................ 01-1
10 STRUCTURE AND FUNCTION,
MAINTENANCE STANDARD ..................................................... 10-1
20 TESTING AND ADJUSTING................................................................................... 20-1
30 DISASSEMBLY AND ASSEMBLY ................................................................... 30-1
90 OTHERS..................................................................................................................................... 90-1
D31/37/39EX, PX-21
30-9
DISASSEMBLY AND ASSEMBLY
FUEL INJECTION PUMP
(1)
REMOVAL AND
INSTALLATION OF FUEL
INJECTION PUMP ASSEMBLY
SPECIAL TOOLS
REMOVAL
1. Open up both engine hoods (1).
2. Remove left engine side cover (2).
3. Close the fuel stop valve.
4. Disconnect fuel control linkage (3).
[*1]
5. Disconnect decelerator pedal linkage (4).
[*2]
6. Remove engine stop solenoid (5).
[*3]
7. Disconnect air tube (6).
8. Disconnect fuel inlet hoses (7) and (8) and
return hose (9).
9. Remove fuel tubes (10) and (11).
10. Remove lubrication tube (12).
11. Disconnect 4 fuel injection tubes (13).
a Disconnect the tube end on the fuel injection
pump side.
SymbolPart No.
Part Name
NecessityQ'tyNew/remodelSketchA
1 795-799-1131 Gear
t 1
2 795-799-1