TM 5-4930-218-14
Table 5-1. Direct Support and General Support Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HIGH PRESSURE LUBRICANT PUMP
1.
HIGH PRESSURE PUMP OPERATES BUT FAILS TO PUMP LUBRICANTS.
Step 1. Check for faulty check ball or ball seat.
Disassemble pump as necessary to check ball and seat. Replace defective parts (para 6-7).
Check for defective primer piston.
Step 2.
Disassemble pump as necessary to replace primer piston (para 6-7).
2.
HIGH PRESSURE PUMP DOES NOT OPERATE.
Step 1. Check for faulty packings on intake and exhaust valve stems.
Disassemble pump as necessary to replace packings on valve stems (para 6-7).
Step 2. Check for bent or damaged shafts and cylinders.
Disassemble pump as necessary to replace defective parts (para 6-7).
3.
HIGH PRESSURE PUMP LEAKS GREASE FROM EXHAUST HOLE IN AIR CYLINDER HOUSING.
Check for faulty V-packing around upper pump rod.
Step 1.
Disassemble pump as necessary and replace packings (para 6-7).
4.
HIGH PRESSURE PUMP FAILS TO DELIVER RATED PRESSURE OR VOLUME.
Step 1. Check for defective packings and valve seats.
Disassemble pump as necessary to replace defective parts (para 6-7).
Step 2. Check for bent or scored shafts on cylinders.
Disassemble pump as necessary to replace defective parts (para 6-7).
LOW PRESSURE LUBRICATING PUMPS
1.
LOW PRESSURE PUMP OPERATES BUT FAILS TO PUMP LUBRICANTS.
Step 1. Check for faulty foot valve.
Disassemble pump as necessary to replace foot valve. Replace parts as necessary (para 6-8).
Step 2. Check for faulty transfer valve.
Disassemble pump as necessary to replace faulty transfer valve (para 6-8).
2.
LOW PRESSURE PUMP DOES NOT OPERATE.
Step 1. Check for faulty packings on intake and exhaust valve stems.
Disassemble pump as necessary to replace packings on valve stems (para 6-8).
Step 2. Check for bent shafts and cylinders.
Disassemble pump and replace defective shafts and cylinders (para 6-8).
3.
LOW PRESSURE PUMP LEAKS OIL FROM EXHAUST HOLE IN AIR CYLINDER HOUSING.
Check for faulty V-packing around upper pump rod.
Step 1.
Disassemble pump as necessary to replace packing (para 6-8).
4.
LOW PRESSURE PUMP FAILS TO DELIVER RATED PRESSURE OR VOLUME.
Check for defective packings and valve seats.
Step L
Disassemble pump as necessary to replace defective parts (para 6-8).
Step 2. Check for bent or scored shafts and cylinders.
Disassemble pump as necessary to replace defective parts (para 6-8).
ENGINE OIL AND GEAR OIL DISPENSERS
1.
DISPENSER DELIVERS OIL FROM NOZZLE WITHOUT OPERATING TRIGGER.
Step 1. Check for faulty valve and seat, or broken spring.
Disassemble as necessary to replace valve and seat, or spring (para 6-10).
Step 2. Check for binding of trigger cam.
Disassemble as necessary to free or replace trigger cam (para 6-10).
2.
DISPENSER LEAKS OIL AROUND DIAL.
Step 1. Check for faulty packing around spindle gear and shaft.
Disassemble as necessary to replace packing (para 6-10).
Step 2. Check for scored spindle.
Disassemble as necessary to replace spindle and gear (para 6-10).
3.
DISPENSER LEAKS OIL AROUND TRIGGER CAM.
Step 1. Check for faulty quad rings on trigger cam.
Disassemble as necessary to replace quad rings (para 6-10).
4.
DISPENSER LEAKS OIL BETWEEN CAP AND HOUSING.
Step 1.
Check for faulty preformed packing between cap and housing.
Disassemble as necessary to replace preformed packing (para 6-10).
GREASE DISPENSER
1.
DISPENSER DELIVERS GREASE WITHOUT OPERATING TRIGGER.
Step 1. Check for stuck or bent plunger.
Disassemble as necessary to clean or replace plunger (para 6-12).
Step 2. Check for faulty ball and ball seat, or broken spring.
Disassemble as necessary to replace ball, seat, or spring (para 6-12).
5-2
