Thermo King Precedent™ Condenser Motor Bearings Installation guide

Brand: Thermo King

Model: Precedent™ Condenser Motor Bearings

Type: Installation guide

Kit 401603

RCS1744

NNoottee:: The following special tools and supplies will also be required, but are not included.

Special Tools and Supplies Required

2043204 Bearing Installation Tool Set

5/16” Socket and Ratchet

T-30 Torx Drive

Plastic or Rubber End Mallet

Large Flat Bladed Screwdriver

Snap Ring Pliers

Torque Wrench

201086 Mobilegrease™28 (or equivalent)

Blue Thread Locker

Spray can of degreaser

Scotch-Brite™ pad (or equivalent)

2020348 Black RTV

Installation Instructions

Precedent™Condenser Motor Bearings

Step 1: Condenser Motor Removal

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1. Remove top facia.

2. Remove condenser fan grille.

3. Remove orifice.

4. Remove fan.

5. Remove junction box cover, disconnect wiring and remove motor from unit.

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Step 2: Disassembly Procedures

The exploded view and the procedures shown are to help assist with bearing replacement.

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1* 2*

4* 5* 6

10* 11*

12 13*

15*

Item Description

1*. Shaft Seal

2*. Lip Seal

3. Drive End Plate

4*. Large Bearing

5*. C-Clip

6. Key

7. Rotor

8. Housing w/Stator

9. Junction Box

10*. Small Bearing

11*. Pre-loading Washer

12. Non-Drive End Plate

13*. Threaded Rod Bolts

14. End Seal

15*. Flange Nut

*Parts included in Kit 401603

Removing End Plates and Rotor

1. Use a 5/16” socket to remove the four threaded rods from motor housing.

2. Use a flat bladed screwdriver to separate and remove the non-drive end plate from housing.

IImmppoorrttaanntt:: Do not insert screwdriver too far into the housing as the stator windings are

approximately ½” to ¾” inside the end plate and can be easily damaged.

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3. Use a mallet and a block of wood and strike the shaft just enough to get the drive end plate

out from the housing so a large 3- jaw puller can grab onto the edges.

a. Remove the key from the shaft.

b. Use the 3- jaw puller to remove the end plate from rotor shaft.

c. Remove rotor from motor housing.

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Removing Bearings

1. With a snap ring pliers, remove snap ring securing the large bearing inside the drive end

plate.

a. Remove large bearing from end plate.

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2. Use a 3-jaw puller to remove small bearing from the rotor shaft.

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Step 3: Cleaning and Inspection

IImmppoorrttaanntt:: DO NOT use steel wool to clean rotor shafts. Use Scotch-Brite

™

pads (or

equivalent).

1. Clean rotor shaft surfaces thoroughly with degreaser and inspect the bearing and seal

surfaces.

a. Bearing and seal surfaces must be smooth – DO NOT continue if shaft(s) show signs of

excessive wear or damage from overheating, etc.

2. Inspect rotor for damage – DO NOT continue if rotor is damaged.

3. Inspect stator for damage – DO NOT continue if stator is damaged.

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4. Thoroughly clean the following:

a. Motor housing where end plates attach.

b. Inside end plates where the bearings are located.

NNoottee:: Remove and retain the rubber end seal from the non–drive end plate. This will be

reinstalled later.

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Step 4: Bearing Installation and Reassembly

Procedures

1. With a 32 oz. dead blow hammer and a small bearing installation tool, carefully drive the new

small bearing onto the rotor shaft.

NNoottee:: Hold the drive end while installing the small bearing onto the shaft.

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2. Install the new large bearing into the drive end plate and secure with the new snap ring.

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3. Reinstall rotor into motor housing and stand it up on its end with block of wood under the

shaft as shown.

a. Apply a thin bead of RTV around the sealing surface and position the drive end plate onto

the rotor.

b. Use the large bearing installation tool and a 32 oz. dead blow hammer and carefully drive

the end plate onto the shaft until the bearing is fully seated.

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4. Set the motor back down onto its mounting base.

a. Apply a thin coating of grease around the new lip seal and install into the end plate

followed by the new end seal.

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5. Apply a thin bead of RTV around the outside edges of the non-drive end plate.

6. Place the pre-loading washer inside the center of the plate.

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RTV

7. Position the end plate with the pre-loading washer onto the housing and use a plastic or

rubber ended mallet and tap around the end plate until it is flush with the housing.

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8. Apply blue thread locker to the ends of the new threaded rods and loosely reinstall into the

housing along with the new nuts.

a. Use a plastic or rubber ended mallet and tap around the drive end plate to help seat the

plate while tightening the rods in a 3-step increments until reaching 49 in-lb (5.5 N•m).

9. Reinstall the rubber end seal onto the non-drive end plate.

10.Reinstall key into keyway.

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Step 5: Condenser Motor Installation

1. CCoonnddeennsseerr MMoottoorr — Reinstall motor onto the unit and torque hardware per table below.

2. FFaann — Position fan with the taper lock bushing resting on the motor shaft shoulder.

a. Hand tighten the hub bolts until the bolt head is flush with the hub face.

b. Using a wrench, alternately tighten each bolt one full turn. Repeat until torque builds.

c. Use a torque wrench and tighten bolts per table below.

3. OOrriiffiiccee – Reinstall onto the unit and torque hardware per table below.

4. GGrriillllee – Reinstall onto the unit and torque hardware per table below.

5. TToopp CCaapp – Reinstall onto the unit and torque hardware per table below.

6. Reconnect power to unit and verify condenser motor operation.

Hardware Torque Specifications

Condenser Motor 168–224 in. lbs (19.0– 5.3 Nm)

Fan 77–101 in. lbs. (9–11.4 Nm)

Orifice 72–96 in. lbs. (8.1– 0.8 Nm)

Grille 72–96 in. lbs (8.1– 0.8 Nm)

Top Cap 72–96 in. lbs (8.1– 0.8 Nm)

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Thermo King Precedent™ Condenser Motor Bearings Installation guide

Thermo King Precedent™ Condenser Motor Bearings Installation guide

Thermo King Precedent™ Condenser Motor Bearings Installation guide

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