HOIST AND COUNTERWEIGHT RT540E SERVICE MANUAL
5-2 Published 4-20-2015, Control # 502-01
MAINTENANCE
Warm-up Procedure
A warm-up procedure is recommended at each start-up and
is essential at ambient temperatures below 4°C (+40°F).
The prime mover should be run at its lowest recommended
RPM with the hydraulic hoist control valve in neutral allowing
sufficient time to warm up the system. The hoist should then
be operated at low speeds, forward and reverse, several
times to prime all lines with warm hydraulic oil, and to
circulate gear lubricant through the planetary gear sets.
Removal
1. If the CE option is provided, remove the hoist covers.
2. Remove all cable from the hoist drum.
3. Tag and disconnect the hydraulic lines to the hoist. Cap
or plug all lines and openings.
4. Tag and disconnect the electrical wires to the hoist
rotation indicator sensor.
5. Tag and disconnect the electrical wires to the hoist hi-
speed solenoid valve.
6. Remove the hoist mounting nuts, capscrews, washers,
and shims (if shims are used, mark their location).
NOTE: The HP15C-17G hoist assembly, less the cable,
weighs approximately 340 kg (741 lb).
7. Using an adequate lifting device, remove the hoist from
the crane.
DANGER
Failure to properly warm up the hoist, particularly under
low ambient temperature conditions, may result in
temporary brake slippage due to high back pressures
attempting to release the brake, which could result in
property damage, severe personal injury or death.
FIGURE 5-1FIGURE 5-1
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6952
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