Manitowoc MLC165-1 Service Maintenance Manual

Reference Only
Manitowoc Published 05-26-17, Control # 238-02 2-35
MLC165-1 SERVICE/MAINTENANCE MANUAL HYDRAULIC SYSTEM
2
2
Drum Brake Test
Perform an operational test of each brake weekly.
NOTE See Table 2-1 on page 2-15
for system pressure
specifications.
The electrical connector must be disconnected at
the brake solenoid valves to stall the crane
functions during the test.
1. At the pilot brake and pawl manifold (Figure 2-13 on
page 2-10), disconnect the electrical connector from the
solenoid for the brake being checked.
2. Start and run the engine at low idle.
3. Turn off the park switch on the control console for the
function being checked.
4. At the display, navigate to the diagnostic screen for
function being checked (See the MLC165-1 Main
Display Operation manual for display navigation
instructions).
NOTE For the front or rear load drum, make sure free fall
is off.
Monitor the system pressure and pump command
while moving the control handle.
5. Slowly move the control handle the for function being
checked and verify:
• Specified system pressure is reached before 50%
pump command is reached.
• Brake does not slip.
If the brake fails to meet these criteria, it must be repaired or
replaced and retested before operating with a load.
6. Turn on the park switch on the control console for the
function being checked.
7. Shut off the engine.
8. At the pilot brake and pawl manifold, reconnect the
electrical connector to the solenoid of the brake that was
checked.
Swing Brake Test
Perform an operational test of the swing brake weekly in an
area where the crane be swung without interference.
NOTE See Table 2-1 on page 2-15
for system pressure
specifications.
1. Start and run the engine at low idle.
2. Turn off the swing park switch.
3. At the display, navigate to the swing diagnostics screen
and verify the swing park brake is released.
4. Swing the crane by moving control handle in both
directions and verify the rotating bed swings freely.
5. Move the control handle to the neutral position and allow
the rotating bed to come to a complete stop.
6. Turn on the swing park switch.
7. At the display, verify the swing park brake is applied.
8. Attempt to swing the crane by moving control handle in
both directions and verify:
• Specified system pressure is reached before 50%
pump command is reached.
• Swing brake does not slip.
If the brake fails to meet these criteria, it must be repaired or
replaced and retested before operating with a load.
9. Shut off the engine.
CAUTION
Overheating Hazard
Do not stall any function for more than 5 seconds.
Damage from overheating can occur to the system
components.
WARNING
Falling Load/Moving Crane Hazard
If a disc brake slips when the drum brake test is
performed, repair or replace it before placing crane back
into service. Loads could fall or the crane could move if
the brakes are not operating properly.
See the corresponding motor or gearbox manufacturer’s
manual for disc brake repair instructions.
CAUTION
Overheating Hazard
Do not stall any function for more than 5 seconds.
Damage from overheating can occur to the system
components.
WARNING
Moving Crane Hazard
If a disc brake slips when the swing brake test is
performed, repair or replace it before placing crane back
into service. The crane could move if the brakes are not
operating properly.
See the corresponding motor or gearbox manufacturer’s
manual for disc brake repair instructions.

Manitowoc MLC165-1 Specifications

General

Brand	Manitowoc
Model	MLC165-1
Category	Construction Equipment
Language	English