Two Piece Stator Construction; Final Checks; Installation - JLG H340AJ Service And Maintenance Manual

Two Piece Stator Construction

A disassembled rotor set (8) that cannot be readily assembled
by hand and has a two piece stator can be assembled by the
following procedures.
1. Place stator half onto wear plate (9) with seal ring (4)
side down, after following motor assembly procedures
1 through 13. Be sure the seal ring is in place.
2. Align stator bolt holes with wear plate and housing
bolts and turn two alignment studs finger tight into bolt
holes approximately 180 degrees apart to retain stator
half and wear plate stationary.
3. Assemble rotor, counterbore down if applicable, into
stator half, and onto wear plate (9) with rotor splines
into mesh with drive link (10) splines.
NOTE: Use any marking you applied to rotor set components to
reassemble the components in their original relationship
to ensure ultimate wear life and performance.
4. Assemble six vanes, or as many vanes that will readily
assemble into the stator vane pockets.
EXCESSIVE FORCE USED TO PUSH THE ROTOR VANES INTO PLACE COULD
SHEAR OFF THE COATING APPLIED TO THE STATOR VANE POCKETS.
5. Grasp the output end of coupling shaft (12) with locking
pliers or other appropriate turning device and rotate
coupling shaft, drive link and rotor to seat the rotor and
the assembled vanes (8C) into stator half, creating the
necessary clearance to assemble the seventh or full
complement of seven vanes. Assemble the seven vanes
using minimum force.
6. Place second stator half on a flat surface with seal ring
groove up. Apply a small amount of grease to a new seal
ring (4) and assemble it into stator half ring groove.
7. Assemble the second stator half over the two alignment
studs and rotor with seal ring side down onto the first
stator half aligning any timing marks applied for this
purpose.
IF THE STATOR HALF (8B) IS A DIFFERENT HEIGHT (THICKNESS) THAN STATOR
HALF (8D) THE STATOR VANES (8C) OR (8E)OF THE SAME LENGTH (HEIGHT) AS
THE STATOR HALF MUST BE REASSEMBLED IN THEIR RESPECTIVE STATOR
HALF FOR THE ROTOR SET TO FUNCTION PROPERLY.
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SECTION 3 - CHASSIS & TURNTABLE
8. Assemble six vanes, or as many vanes that will readily
assemble into the stator vane pockets.
9. Grasp the output end of coupling shaft (12)
with locking pliers or other appropriate turning device
and rotate coupling shaft, drive link and rotor to seat the
rotor and the assembled vanes into stator, creating the
necessary clearance to assemble the seventh or full
complement of seven vanes. Assemble the seven vanes
using minimum force.
Go to assembly procedure #15, to continue assembly.

Final Checks

1. Pressurize the motor with 100 p.s.i. dry air or nitrogen
and submerge in solvent to check for external leaks.
2. Check motor for rotation. Torque required to rotate cou-
pling shaft should not be more than 50 ft. lbs. (68 N m)
3. Pressure port with "A" cast under it on housing (18) is for
clockwise coupling shaft rotation as viewed from the
output end of coupling shaft. Pressure port with "B" cast
under it is for counterclockwise coupling shaft rotation.
4. Use test stand if available, to check operation of the
motor.

Installation

Refer to Figure 3-10., Swing Motor Removal and Installation.
1. Carefully insert the swing motor into the swing drive,
making sure the swing motor shaft key is aligned cor-
rectly.
2. Secure the swing motor to the swing drive assembly
with the retaining bolts. Apply threadlocker JLG P/N
0100019 to the threads of the retaining bolts and torque
to 85 ft. lbs. (115 Nm).
3. Connect the hydraulic lines running to the swing motor
as tagged during removal.
4. Operate the swing function in both directions to ensure
proper operation. Inspect the hose connections for any
leakage.
T O R Q U E
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