TROUBLESHOOTING
PROBLEM PROBABLE CAUSE SUGGESTED SOLUTIONS
5.
Excessive Pressure
1. Clogged orifice filter. 1. Remove and check orifice filter and disc assembly. Cleanas
required. Pay special attention to small orifice. This is where
clogging is most likely to occur.
2. 2. Replace filter element.
3. 3. Check relief valve for proper operation. Valve should main-
tain line pressure of 45-65 psi as measured at gauge on
instrument panel.
Contaiminated oil filter
Charging pump relief
valve stuck closed
6. Excessive
Converter Noise
1. Positioner control out
of adjustment and
sliding sleeve
"bottoming" on impeller
2. Bearing failure
1. Adjust positioner setting if necessary.
2. Internal converter parts are not field serviceable. Contact a
Manitowoc Dealer for replacement or rebuilding as required.
See Bulletin 221.
7. If equipped with
engine clutch:
Clutch jumps out of
engagement
1. Adjustment too tight
2. Worn linkage
3. Improperly positioned
hand lever or linkage.
1. Properly adjust clutch.
2. Replace worn parts.
3. Adjust hand lever or linkage so that engaging collar is in
neutral position after engagement is made.
Clutch will not
release
1. Warped clutch plates 1. Remove the torque converter from the engine and replace
or flywheel faulty parts.
1. Excessive grease in 1. Remove the torque converter from the engine. Disassemble
clutch release the clutch. Wash the driving plate assembly with cleaning
ball bearing, fluid (non-oil base, non-inflammable), or replace driving plate
assembly.
2. Properly adjust clutch.
Slipping Clutch
.
Adjustment too loose
Noisy clutch
1. Inadequate lubrication
of clutch release
ball bearing.
.
Worn splines on input
shaft and/or clutch
driving plate
1. Grease bearing as instructed. If noise persists, replace
bearing.
2. Remove the torque converter from the engine. Disassemble
the clutch and replace worn parts.
FOLIO 941-15
395143
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