Unit Injection Pump Group (HEUI Engine Hydraulic Oil Supply)
Usage:
TRACK-TYPE TRACTORS
D10R (3KR) TRACTORS;
24H (7KK) MOTOR GRADERS;
631E (1AB1640-UP) 637E (1FB660-UP) WHEEL-TRACTOR SCRAPERS;
990 (4FR) WHEEL LOADERS, PM-565 (3TK) COLD PLANERS, 3408E (7PR),
3412E (4CR) INDUSTRIAL ENGINES;
834B (7BR),
836B (7FR) WHEEL COMPACTORS
MOTOR GRADERS
WHEEL-TRACTOR SCRAPERS
WHEEL LOADERS
PAVING PRODUCTS
ENGINES
D9R (7TL, 8BL),D10R (3KR) TRACTORS;
24H (7KK) MOTOR GRADERS;
631E (1AB1640-UP) 637E (1FB660-UP) WHEEL-TRACTOR SCRAPERS;
990 (4FR) WHEEL LOADERS, PM-565 (3TK) COLD PLANERS, 3408E (7PR),
3412E (4CR) INDUSTRIAL ENGINES;
834B (7BR),
836B (7FR) WHEEL COMPACTORS
Problem:
Reports have been received of attempted field service adjustment of screws (1) and (2) on the unit injection pump group. See the illustration.
Solution:
Screws (1) and (2) are set at the factory and should NOT be adjusted during field service. Use the appropriate 3408E or 3412E Engine Troubleshooting guide for acceptable service procedures.
Do NOT adjust screws (1) and (2) during field service. HEUI ENGINE HYDRAULIC OIL SUPPLY PUMP GROUP 
UNIT INJECTION PUMP GROUP
COPYRIGHT 1996 CATERPILLAR ALL RIGHTS RESERVED
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