(3) Measuring clearance between drive shaft and bushing
a. Measure the outside diameters of the drive shaft and driven shaft, and replace if the
measured values are less than the limit ( 16.95mm)
b. Measure the inside diameter of the pump body bushing to determine the clearance
between the bushing and shaft, and compare the measured value with the standard
value to determine whether to replace or not.
•
Reassembly
(1) For reassembly, reverse the disassembly sequence.
10.2.3. Diagnostics and troubleshooting
- 127 -
Standard 16.95 ~ 16.968 mm
Clearance 0.032 ~ 0.077 mm
Complaints Possible causes Corrections
1. Oil consumption
•
Poor oil
•
Use suggested oil
excessive
•
Oil seal or packing leaky
•
Replace
•
Pistons or piston rings worn
•
Replace pistons and/or
piston rings
•
Cylinder liner worn
•
Replace cylinder liner
•
Piston rings sticking
•
Replace pistons and/or
piston rings
•
Valve guide oil seals or valve
•
Replace
guides, or valve stem worn
2. Oil pressure too low
•
Poor oil
•
Use suggested oil
•
Relief valve sticking
•
Replace
•
Restrictions in oil pump strainer
•
Clean strainer
•
Oil pump gear worn
•
Replace
•
Oil pump feed pipe cracked
•
Replace
•
Oil pump defective
•
Correct or replace
•
Oil pressure gauge defective
•
Correct or replace
•
Various bearings worn
•
Replace
3. Oil deteriorates quickly
•
Restriction in oil filter
•
Replace filter element
•
Gases leaking
•
Replace piston rings and
cylinder liner
•
Wrong oil used
•
Use suggested oil
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