TROUBLESHOOTING
PROBLEM PROBABLE CAUSE SUGGESTED SOLUTIONS
1. Fluid Loss 1. Leaking seals 1. Some leakage is normal. However, if leakage is severe or
2.
Leaking lines
and/or connections
3. Overflowing reservoir
4. Other converter
leakage
performance impaired, contact a Manitowoc Dealer.
2. Check all lines and connections under normal operating
pressure. Tighten loose connections or replace defective
parts.
3. Tank overfilled. Fill only to FULL mark on dipstick. Conver-
ter oil expands when hot. Bleed air from system; air expands
when hot.
4. Tighten all suspected bolts and/or connections. DO NOT
OVERTIGHTEN! Contact a Manitowoc Dealer if leakage is
extreme or performance impaired
2. Poor Performance
1. Air in oil system
2. Oil level too low
3. Low charging pressure
4. Inadequate cooling
1. Bleed system. Be sure orifice in orifice filter is open.
2. Check oil level. Fill to FULL mark on dipstick. Check for oil
leaks under normal operating pressure.
3. Check accuracy of gauge; replace if faulty. Check all lines,
connections and filters for leakage and/or obstructions; cor-
rect any fault or replace any defective parts. Charging pump
relief valve may be stuck open; repair or replace as required.
Check charging pump belt; adjust if necessary.
4. See Problem 3.
3. Converter
Overheating
1. Faulty temperature gauge
or sending unit
2. Low charging Pressure
3. Oil level too low
4. Air in oil system
5. Restricted oil flow in con-
verter system
6. Heat exchanger oil flow
plugged
7. Incorrect use of converter
8. Belts loose at coolant 8.
pump or radiator fan
9. Engine radiator cores 9.
plugged
10. Wrong fan or fan blades 10.
set wrong
11. Radiator shroud not on or 11.
centered
4. Low Output
1.
Low air pressure
to
converter positioner.
Positioner out of
adjustment.
2. Low charging pressure
3. Air in oil system
4. Improper oil in system
1. Replace faulty part.
2. See Problem 2-3.
3. See Problem 2-2.
4. See Problem 2-1.
5. Replace faulty or restricted hose.
6. Clean or replace heat exchanger.
7. High engine speed when traveling crane long distance.
Travel at a lower engine speed.
Adjust belts.
Clean radiator cores.
Install correct fan or adjust fan blades (fan should blow out
in warm weather and suck in during cold weather).
Complete shroud must be in place and centered around fan.
1. Check air pressure to positioner. Should be at least 105 psi
to fully open. Correct as necessary. Adjust positioner if neces-
sary.
2. See Problem 2-3.
3. See Problem 2-1.
4. Check for proper oil. See Bulletin 152 in Service Manual
for
correct oil specification. Drain and refill system if incorrect
oil has been used. Excessive temperatures can lower oils
lubricating capacity.
(Continued)
FOLIO
941-14
395143
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