89
Operating Manual Crawler Excavator TC37
Care and Maintenance
7
7.8.15 Swing bearing
Lubrication of toothing
The grease nipple (61/1) mounted on the left side
inside the cabin lubricates the toothing of the ring gear
via a nozzle tube (61/2). To do so:
• Slowly slew the uppercarriage and lubricate it
thoroughly at the same time using a grease gun.
Lubrication of bearing races
The bearing races are lubricated via the lubricating
nipples (61/3) mounted on the ring gear. To do so:
• Slowly slew the uppercarriage and lubricate it
thoroughly until the gasket has a collar (61/4) of
fresh grease.
Checking the secure fastening of the swing
bearing
The following assembly conditions are prerequisites
for an optimum bolted connection on the chassis and
the uppercarriage:
– The contact faces of bolts must be of bright metal,
i.e. absolutely free from grease and paint.
– The thread and the bolt head must not be
damaged.
• All screws/bolts must be examined to ensure that
they are tightened to the torques specified in
Fig. 62.
Checking the swing bearing attachment
• All screws/bolts must be examined to ensure that
they are tightened to the torques specified in
Fig. 62.
Fig. 61
Ring gear
HR3.7-04-66
2
4
1
3
4
Attention
• When mounting for the first time, the bolts
must again be checked after 100 operating
hours.
Fig. 62
Swing bearing
A) Uppercarriage
B) Chassis
C) Oval hole (x3) (below the oval cover)
HR32-04-67
A
B
C
MA = 84.82 lbf ft
MA = 84.24 lbf f
MA = 136.46 lbf ft
C
Direction of travel
Machine damage
due to damaged screws/bolts.
• Replace damaged screws/bolts
immediately.
