JLG Skytrak 6036 Service Manual page 78

Section 6. Drive Shafts and Drop Box
a. Inspection
Replace oil seal (4, Fig. 6.4) if worn or damaged.
b. Removal
To remove oil seal, remove screw (1), Fig. 6.4,
washer (2), end yoke (3) and oil seal (4).
c. Installation
1. To install oil seal, press oil seal and yoke on
shaft.
2. Press yoke (3, Fig. 6.4) on shaft and secure
with washer (2) and screw (1).
6.2.3 Internal Inspection
NOTE: JLG does not recommend servicing of
gears, shafts or bearings inside this drop box. The
drop box is manufactured in such a way that
attempts at internal disassembly of these items
may cause damage to other parts and possibly the
drop box case. The only serviceable items of this
drop box are the yokes and oil seals. If internal
servicing of drop box is required while still under
warranty, JLG recommends that the box be re-
turned to the factory for rebuild or replaced with a
new box. Out of warranty repairs or rebuilding may
be performed at the customer's discretion; how-
ever, it is not an easy job.
a. Removal
1. Remove the transmission and hydraulic tank
covers from the frame.
2. Remove the U-bolt assembly or bearing straps
attaching the transmission drop gear box drive
shaft cross assembly to the drop box input
shaft yoke.
3. Remove the U-bolt assemblies attaching the
axle drive shaft cross assemblies to the drop
box output shaft yokes. Slide slip joint back as
far as possible on drive shaft. Tape bearing
caps to cross to prevent loss of bearings.
4. Secure drop gear box in a sling, connect sling
to a hoist and remove slack from hoist line.
5. Drain hydraulic tank. Detach hose that runs
between tank and drop box. Remove bolt and
washer attaching input yoke to drop box.
6. From under the forklift, remove two capscrews
and lock washers securing the box to the
frame.
7. From above, remove the remaining two
capscrews and lock washers attaching the drop
box to the frame.
8. Use hoist to lift drop gear box from forklift.
6-4
9. Clean the exterior of the drop gear box and
move it to a clean work area.
b. Installation
1. From above and below the frame, secure the
drop gear box to the frame with four capscrews
and lock washers. Torque capscrews 67.5 to
82.5 lb-ft (91.8 to 112.2 N m).
2. Remove the vent and level plugs.
3. Using vent plug opening, fill housing with
tractor drop box fluid meeting specifications in
paragraph 6.3 until it flows from the fluid level
plug.
4. Install each plug securely.
5. Secure drive shaft cross assembly to drop box
input shaft yoke with a U-bolt assembly or
bearing strap. Torque U-bolt assembly to 20 to
24 lb-ft (27 to 37 N m) or the bearing strap to 55
to 60 lb-ft (75 to 82 N m).
6. Secure the drive shaft cross assemblies to the
drop box output shaft yokes with a U-bolt
assembly. Torque U-bolt assembly to 20 to 24
lb-ft (27 to 37 N m).
7. Install transmission and hydraulic tank covers
on frame.
6.3 SPECIFICATIONS
Transmission and Drop Box–Use a Tractor Fluid
which meets the requirements of any of the follow-
ing specifications:
John Deere J20 A
Detroit Diesel C-3; C-2
Ford Tractor M2C134B
White Farm UTHF. Q1766, Q1722
Products known to meet these requirements
include:
Texaco THD Oil
ARCO Tractor Fluid or equivalent
CAPACITIES:
Drop Box: 2.0 quarts (1.9 liter)
Transmission System (including filter and oil
cooler): 3 gallons (13.7 liter)
Transmission Filter: 1 quart (0.95 liter)
Model 6036 S/N 9B0499 and Before