JLG 1250AJP Service Manual - Manual (Page 93)

SECTION 3 - 1CHASSIS & TURNTABLE
3121171 – JLG Lift – 3-45
49. Install the special tool (6689960310) on the flanged
hub (31) and turn the screw until it compresses the
springs (45).
50. Assemble the circlip (47) in its seat and remove the
special tool.
NOTE: Before assembling the hydraulic motor, verify by a
depth slide gauge the correct assembly of the unit
checking the axial distance as shown below.
Final Test and Reinstallation
Check the product by remounting it to the machine.
Check the function of the drive hub following all the
checks shown in Startup and Running In.
If work on the brake was undertaken, it is important to
check that there are no oil leaks. Follow the procedure
below:
1. Connect the pressure pilot line with the manometer
(with a base scale of 100 bars) to the brake release
port.
2. Open the flow valve and release the brake with the
pilot pressure of 50 bar.
3. Close the flow valve and keep the brake released 3
minutes or longer.
4. Using the manometer, check that the pressure
remains constant.
NOTE: If the pressure drops it may mean that the brake
seals are not tight and consequently they must be
replaced or it may mean that the reassembling was
not completed properly.
5. After having reassembled the gearbox, install the
hydraulic motor.
6. Fill the gearmotor with the lubricant oil.