Mec Speed Level Series Service & Parts Manual page 39

Secton 5 - Hydraulc System
Rear Wheel Motors With Brakes (DT-710)
Refer to page 34.
Disassembly
1. Make a "V" shaped set of alignment marks on the end-cover and housing to aid in the
reassembly process.
• Clamp the motor housing in a vise with the shaft facing down.
2. Remove the seven (7) bolts that hold the motor assembly together.
• Carefully remove the end-cover - be aware that the piston and spring may fall out������
• Carefully remove the piston from the end-cover and set it aside.
• Remove and discard the O-ring seal and backup seal.
• Remove the spring and set it aside.
3. Lift commutator container and commutator from the motor and set aside.
• Place commutator on a flat, clean surface with the seal facing up.
• Gently tap on the seal with a small screwdriver until the opposite side of the seal lifts from the
groove. Remove the seal and discard.
4. Remove the manifold, rotor set, and divider plate. Remove all seals and discard.
• Remove the drive link from the motor and set aside.
5. Clean all parts in an oil-based solvent and dry using compressed air.
Assembly
1. Apply a light coating of fluid to all new seals prior to installation.
2. Place the housing on a clean, flat surface with the output end facing up.
• Install the dust seal with the lip on the seal facing up.
• Clamp the housing in a vise with the pilot on the housing facing down.
• Install the metal backup shim into the bore.
• Install the backup seal into the housing bore with the lip on the seal facing up.
• Install the shaft seal into the housing bore with the lip on the seal facing up.
• Refer to illustration for seal orientation.
3. Install the bearing shims (not shown in illustration) in housing.
• Install housing bearing.
• Install the shaft being careful not to cut seal lip with the shaft keyway.
4. Locate the 2 thick disk stampings and set them aside.
• Install one (1) thick disk stamping into the housing. Make sure that lugs or splines engage
those in the housing.
• Install one (1) friction disk engaging splines on the disk with those on the shaft.
• Alternate disk stampings and friction disks until all disks except the thick disk stamping are
installed.
• Install the second thick disk stamping on top of the disk assembly.
5. Install the small O-Ring seal and large O-Ring seal into corresponding groves in the piston.
• Install small seal and large seal in corresponding groves over the O-Ring seals.
• Thoroughly coat the seals and sealing surfaces of the housing with clean fluid.
• Install the piston into the housing with the large O.D. side facing up.
• Evenly press the piston down. Be careful not to pinch the seals.
Page 32
Do not allow rollers to drop from the rotor assembly when removing the rotor
from the motor.
Speed Level Seres - Servce & Parts Manual
January 2019