Body And Framework; General; Slew Ring Bearings - jcb JS300 Service Manual

General

Clean
Debris can collect under the boom. Remove all debris from under the boom.
Thoroughly dry the piston rams and protect them with clean transmission or hydraulic oil if necessary.
Check (Condition)
1. Make sure that all of the guards and protective devices are in position, secured by their locking devices
and free from damage.
2. Inspect all of the steelwork for damage. Include the following:
2.1. Examine all of the lifting point welds.
2.2. Examine all of the pivot point welds.
2.3. Examine the condition of all the pivot pins.
2.4. Check that the pivot pins are correctly in position and secured by their locking devices.
3. Check the steps and handrails are undamaged and correctly attached.
4. Check for broken, cracked or crazed window glass and mirrors. Replace the damaged items.
5. Check that the lamp lenses are undamaged.
6. Check that all of the attachment teeth are undamaged and correctly attached.
7. Check that all of the safety and instructional labels are undamaged and in position. Install new labels where
necessary.
8. Note any damaged paintwork for future repair.
9. Inspect the machine for broken or loose fasteners.

Slew Ring Bearings

Lubricate
Make the machine safe.
Arm Lowered) (Page 184).
The slew ring bearings have two grease nipples on the front of the machine and one on the front of the slew ring.
Make sure that grease extrudes from under the seal around all of the circumference. It is not possible to add
too much grease.
D Grease nipples
198

Body and Framework

Refer to: Maintenance > Maintenance Positions > Maintenance Position (Excavator
D
9831/1100-2
Figure 217.
Maintenance
Body and Framework
198