GROVE 5-29
CD3340B/YB4411 MAINTENANCE
Published 04/07/2015 Control # 569-00
7. Remove the check plug (Figure 5-58).
8. Check the lubricant level, which should be level with the
bottom of the check plug hole.
9. If necessary, add Mobil 424 hydraulic oil, or equivalent,
through the breather hole to fill the brake level with the
bottom of the check plug hole.
10. Install both the breather and the check plugs.
Check Hoist Gearbox and Brake Lubricant (Braden
Model)
1. Lower the boom to its lowest position.
2. Engage the parking brake and shut off the engine.
3. Clean the lubricant level sight gauge (Figure 5-60).
4. Using a mirror, and light if needed, check the lubricant
level in the sight gauge. Lubricant must be visible in the
sight gauge.
5. If lubricant must be added, rotate the hoist drum until the
drain/fill plug is visible in the access hole aligned with the
level sight gauge.Clean around the drain/fill and then
remove it. Add recommended lubricant (see Section 8)
through the plug hole until it exits the fill plug hole. Install
the plug.
1000 Hours of Operation/Six Months
NOTE: You must read and understand the warnings and
basic safety rules, found in Safety Practices page
2-1 of this manual, before performing any operation
or maintenance procedures.
For additional engine maintenance guidelines, see
the engine manual furnished with this crane.
Replace the Transmission Oil and Filter
1. Engage the parking brake and shut off the engine.
Remove the ignition key.
NOTE: It is necessary to climb under the crane to drain the
transmission oil. Be sure engine is shut off, the
ignition key is removed and chock blocks are in
place before climbing under the crane.
NOTE: When the strainer is removed, oil will gush out.
Keep to one side when you remove the strainer.
DANGER
Do not use EP type gear lube in the brake section of this
hoist. EP lube may prevent the clutch from locking up,
causing the load to fall and resulting in property damage,
personal injury or death.
p0321
FIGURE 5-59
Check Plug
Location
Breather
DANGER
Failure to use the proper type and viscosity of planetary
gear oil may contribute to intermittent brake clutch
slippage which could result in property damage, severe
personal injury or death. Some gear lubricants contain
large amounts of EP (extreme pressure) and anti-friction
additives which may contribute to brake clutch slippage
and damage to brake friction discs and seals. Oil viscosity
with regard to ambient temperature is also critical to
reliable brake clutch operation. Test have indicated that
excessively heavy or thick gear oil may contribute to
intermittent brake clutch slippage. Make certain that the
gear oil viscosity in the hoist is correct for prevailing
ambient temperature.
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