March 2008
"3072RT / 3772RT / 3772RT HD" Service & Parts Manual - ANSI Specifications
Page 1-12
5. Install the small O-Ring seal and large O-Ring seal into corresponding groves in the pis-
ton.
•
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 oil.
•
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.
IMPORTANT: If the disks and disk stampings are going to be replaced, the stack up on the new
disks must be between .620 and .630 (15,7mm and 16mm) (see illustration).
6. Install spring on top of the piston.
•
Install O-Ring seal in groove in the rear surface of the housing.
•
Install the rear shaft bearing. Make sure that the snap ring that retains the bearing rolls
faces out.
•
Place the rear housing onto the front housing and line up bolt holes.
•
Hold the motor assembly together, remove from the vise and place in an arbor press.
•
Press down on the rear housing until it contacts the front housing and lock the press
•
Install eight (8) capscrews and torque to 45 ft. lbs. (61 Nm).
7. Install the drive link into the end of the shaft with the tapered end facing up.
•
Place the body seals in the grooves in both sides of the rotor.
•
Place the rotor onto the housing with the side of the rotor with the chamfer in the splines
facing the housing.
•
Place the manifold over the rotor with the seal groove side up.
•
install the manifold seal.
8. Install the commutator seal into the commutator with the metal side facing out.
•
Use finger pressure to press the seal down flush with the surface of the commutator.
•
Place the commutator onto the manifold and then place the commutator onto the protrud-
ing end of the drive link. Make sure that the seal side is facing up.
9. Install the remaining body seal in the groove on the endcover.
•
Install the piston spring into the endcover, then the white backup seal followed by the
O-Ring seal.
•
Line up the alignment pin with the hole in the endcover and press the piston into the
endcover.
•
While holding the piston in place, lower the endcover assembly onto the motor. Align the
“V” shaped marks that were made on the housing and endcover before disassembly.
10. Install the seven (7) assembly bolts.
• Tighten bolts in sequence (see illustration)
•
Pre-torque to 10 ft. lbs (13,6 Nm).
•
Final torque to 50 ft. lbs (67,8 Nm).
Summary of Contents for 3072RT
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Page 93: ...3072RT 3772RT 3772RT HD Service Parts Manual ANSI Specifications March 2008 Page 5 9...
Page 96: ...March 2008 3072RT 3772RT 3772RT HD Service Parts Manual ANSI Specifications Page 5 12...
