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SECTION 5. TROUBLE SHOOTING
PROBABLE CAU
SYMPTOM
PROBABLY CAUSE
REMEDY
A. Low oil pressure (at full
operating speed and temperature
1. Faulty pressure gauge
2. Low oil level
3. Clogged filter element
4. Clogged suction tube
5. Clogged parts in selector valve, base
plate or housing
6. Dirt or sludge in transmission
7. Worn pump assembly
8. Incorrectly adjusted pressure relief
valve
9. Oil too hot
10. Worn commutator bushing
11. Incorrect lubricant
12. Scratched clutch cylinders or hard O-ring
in clutch cylinders
1. Check gauge against one of known
accuracy
2. Inspect gaskets, seals, hoses and
fittings for leakage. Pressure test oil
cooler-tubes may leak
3. Replace filter element
4. Remove tube and clean with
solvent. Blow dry
5. Flush clean with solvent and blow dry
6. Remove drain plugs, flush gear with
commercial solvent or diesel fuel. Start
engine; at idle shift gear several times, full
forward to full reverse for 3-5 minutes
maximum. Shut down engine and drain
7. Refer to oil pump section
(Page 17) or fig. 13, p.11.
8. See fig.13 page 11
9. Check heat exchanger system for
clogged oil cooler or hoses.
10. See wear limits chart (p.23)
11. See lube chart (p.12)
12. Replace as necessary (p.25)
B. High Oil pressure (At full operating
speed and temperature)
1. Incorrect adjusted pressure relief valve
2. Inoperable relief plunger in base plate
3. Incorrect oil
4. Cold oil
5. Cold oil at start-up
1. Refer to fig.13 p.11
2. Refer to p.17
3. See lube chart (p.12)
4. Check heat exchanger system
5. Transmission should be pre-heated see
p.11
C. No Oil Pressure
1. Faulty pressure gauge
2. Broken hose
3. No oil in transmission
1.check pressure with gauge of known
accuracy
2. Replace hose. Inspect all hoses
3. Fill with proper oil. See p.12
5.1 TROUBLE/REMEDY CHART
Содержание HY- 6900
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