JLG E300 Service Manual - Manual (Page 68)

SECTION 3 - CHASSIS & TURNTABLE
3-34 – JLG Lift – 3120772
8. Gently tap the shaft upward through the housing
and remove through the rear of the housing. Turn
the shaft over and remove the cooling plug.
9. Remove the housing from the vise and turn over. Pry
the dust seal from the housing.
10. Push the seal carrier, thrust washer, and thrust bear-
ing down and remove from the rear of the housing.
NOTE: When removing the seal carrier, thrust washer, and
thrust bearing take care not to scratch or nick the
housing bore.
11. If a new seal carrier and thrust washer are included
in the repair kit, the old items may be discarded. If
not, carefully pry the shaft seal, teflon backup seal,
and metal backup shim from the seal from the seal
carrier and discard the metal backup shim, backup
seal, and shaft seal. Lay the seal carrier aside.
12. Remove the wire ring, metal backup shim, and high
pressure seal from the inner bore groove of the
housing with a small screwdriver and discard them.
13. All parts should be cleaned in an oil based solvent
and dried using compressed air. All new seals
should be lightly coated in clean oil prior to installa-
tion.
Assembly
FOR PROPER OPERATION, THE MOTOR DEPENDS ON THE COR-
RECT ORIENTATION OF PARTS AS WELL AS THE CORRECT
INTERNAL TIMING.
1. Place the shaft on a clean flat surface with the output
end facing up.
2. Place the thrust bearing, then thrust washer, on the
shaft.
3. Install the shaft seal down onto the shaft making
sure the lip on the seal faces down. Refer to Figure
3-23., Seal Orientation.
4. Install the teflon backup seal onto the shaft with the
flat side up and the seal lip facing the shaft seal.
5. Place the metal backup shim onto the shaft and
against the teflon backup seal.
6. Place the seal carrier onto the shaft (large end
down) and carefully press the seal carrier down onto
the seal assembly using an arbor press and sleeve
to compress the seals into the carrier.
7. Install the high pressure seal into the groove in the
housing.
8. Install the metal backup shim against the high pres-
sure seal in the groove in the housing bore by
squeezing the shim between the thumb and forefin-
ger to bow shim (bow in the shim should be in the
shape of a hill and not a valley for easier installation).
9. While maintaining the bow in the shim, start the shim
into the groove and use a small screwdriver to push
the shim into the groove. Install the wire ring into the
groove making sure the ends are butted.
Shaft Timing Procedure
FOR PROPER OPERATION, THE MOTOR DEPENDS ON THE COR-
RECT ORIENTATION OF PARTS AS WELL AS THE CORRECT
INTERNAL TIMING.
1. Turn shaft over so the output end of the shaft faces
down.
2. Install the cooling plug into the shaft making sure
the large OD end of the cooling plug faces up.
DUST SEAL
SPLIT WIRE
RING
HIGH
PRESSURE
SEAL
SEAL
CARRIER
METAL
BACKUP
SHIM
TEFLON
BACKUP
SEAL
SHAFT
SEAL
Figure 3-23. Seal Orientation
METAL
BACKUP
SHIM