JLG 80SL Service Manual - Manual (Page 79)

SECTION 3 - CHASSIS, PLATFORM & SCISSOR ARMS
3121325 – JLG Lift – 3-43
Scissor Arms Disassembly
INDIVIDUAL SCISSOR ARMS ARE HEAVY. USE CAUTION WHEN
REMOVING. USE APPROPRIATE LIFTING DEVICES.
1. Disconnect battery and shutoff flow of hydraulic fluid
by closing the shutoff levers on the hydraulic tank
(see Figure 3-20.).
2. Remove Platform (see Figure 3-32., Platform
Removal - 1 of 2 (Front of Platform) and Figure 3-33.,
Platform Removal - 2 of 2 (Rear of Platform)).
3. Hydraulic lines and electrical lines run through the
insides of the scissor arms. These hoses and wires
must be removed before removing the arm compo-
nents.
4. Brace the Scissor Arm Assembly as well as the indi-
vidual Scissor Arm(s) being removed.
NOTE: The below steps apply to each scissor arm pin.
5. On the left side of the machine, remove the Nut (2)
with a spanner wrench. Next remove the Retaining
Washer (3) and Washer and Pin (4).
6. Move to the right side of the machine. The Arm Pin
(1) can now be pulled out of the scissor arm stack.
Remove the four Bushings (2), two Ball Thrust Bear-
ings (3), and two Bushings (4).
7. Repeat steps 4 and 5 at each Arm Pin in order to
remove the individual scissor arm.
8. Carefully lift the arm from the assembly.
NOTE: Follow the removal steps in reverse order when
installing the scissor arms.
Tighten the Lock Nuts until there is zero clearance
between the arms and the bearings. Back off one
quarter of a revolution. Bend the lip on the corre-
sponding Retaining Washer into the notch on the
lock nuts.
1
2
3
4
1. Arm Pin (75mm, 90mm, 110mm, or 130mm)
2. Nut (80mm or 100mm)
3. Retaining Washer (60mm, 80mm, or 100mm)
4. Washer & Pin
Figure 3-38. Scissor Arm Removal (Left Side)
1
2
3
3
2
4
1. Arm Pin (75mm, 90mm, 110mm, or 130mm)
2. Bushing (75 x 60mm, 90 x 60mm, 110 x 60mm, or
130 x 60mm)
3. Ball Thrust Bearing
4. Bushing (75 x 80mm, 90 x 100mm, 110 x 110mm,
or 130 x 100mm)
Figure 3-39. Scissor Arm Removal (Right Side)