5-2
Published 10/19/2017, Control # 618-00
HOIST AND COUNTERWEIGHT GRT880 SERVICE MANUAL
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.
Hoist Area Access
Working Position
Refer to (Figure 5-1).
1. Lift and pull out steps (4) until they hang vertically from
bracket.
2. Remove two pins and raise side rail (3). Reinsert pins.
3. Remove two pins and raise rear rail (2). Reinsert pins.
4. Raise two hoist mirrors (1) until they lock in position or
adjust as needed to perform maintenance tasks.
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.
DANGER
Do not use platform for hauling passengers. Death or
serious injury could occur.
No storage of components is allowed on the platform.
Only one person at a time is allowed on the platform.
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