JLG 680S Service Manual - Manual (Page 96)

SECTION 3 - CHASSIS & TURNTABLE
3-48 – JLG Lift – 3121234
Housing-Spindle Sub-Assembly
NOTE: Spray a light film of oil on all component parts during
assembly.
SAFETY GLASSES MUST BE WORN DURING THE ENTIRE HOUS-
ING-SPINDLE SUBASSEMBLY.
1. Press Bearing Cup (1C), position A, into Housing
(1E) using appropriate pressing tool (See back of
manual).
2. Turn Housing (1E) over and place into pressing
base. Press nine Studs (1H) into Housing (1E).
NOTE: Use enough pressure to press in studs. Don t use
excessively high pressure to press in studs or Hous-
ing may crack. Make sure head of stud contacts face
of flange on Housing.
NOTE: Spray a generous amount of oil on bearings during
installation.
3. Press Bearing Cup (1C), position "B", into Housing
(1E) using “B” Bearing Cone pressing tool (see back
of manual).
4. Place Bearing Cone (1D), into Bearing Cup (1C),
position "B".
5. Grease Seal (1B) lip and press seal into Housing
(1E) using seal pressing tool (see back of manual)
until seal is flush with end of Housing.
6. Turn Housing (1E) over and lower onto Spindle (1A).
7. Install Bearing Cone (1D) into Bearing Cup (1C),
position "A". and lightly press on Bearing Cup using
the “A” Bearing Cone pressing tool (see back of
manual) while rotating Housing (1E) in both direc-
tions to seat bearings.
8. Place Bearing Spacer (1F) on top of Bearing Cone
(1D).
9. Using retaining ring pliers, install Retaining Ring
(1G) into Spindle (1A) groove. Make sure ring is
completely seated in groove.
NOTE: Extra bearing pre-load caused by pressing “A” Bear-
ing Cone (1D) must be removed. This should be
done by placing a flat piece of steel or a pressing
tool on the end of the spindle, and then lightly strik-
ing the tool with a piece of barstock. This should be
adequate to remove any additional bearing pre-load.
DW2B Integral Brake Check
1. Using appropriate fittings, connect hydraulic line
from hand pump to brake port.
2. Check to see that brake is set by trying to rotate
Input Shaft (7). This can be accomplished by install-
ing an appropriate tool (any tool that can locate on
the splines of the Input Coupling (9), such as a mat-
ing splined shaft) into Input Coupling (9)
3. Bleed brake. Increase hydraulic pressure gradually
while trying to rotate the input until brake just starts
to release. Note this pressure. Make sure the pres-
sure falls into the appropriate range below.
4. Increase pressure to 3,000 psi and hold for 30 sec-
onds to check for leaks. Repair leaks if necessary.
NOTE: Make sure that brake re-engages when pressure is
released.
NOTE: When done, make sure Input Coupling (9) is cen-
tered in Spindle (1A) to make installation of motor
possible without release of brake.
BRAKE
CODE
BRAKE P/N
JUST RELEASE
PRESSURE RANGE (psi)
A 902337 185-230
B 902341 155-192
C 902342 125-155
D 902343 93-115
E 902345 132-172