Thermo King Precedent™ Generator Bearing Kit 401503 Installation guide

Brand: Thermo King

Model: Precedent™ Generator Bearing Kit 401503

Type: Installation guide

RCS1961

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

Special Tools and Supplies Required

T25 Torx Driver

Awl or Scribe Tool

Large Flat Bladed Screwdriver

3-Jaw Pullers (small and large)

2043188 Bearing Installation Tool Set

Snap Ring Pliers

5/16” Socket

Plastic or Rubber End Mallet

32 oz. Dead Blow Hammer (or equivalent)

Torque Wrench

2030386 Mobilegrease™28 (or equivalent)

Blue Thread Locker

Spray can of degreaser

2020348 Black RTV

Scotch-Brite™ pad (or equivalent)

IImmppoorrttaanntt:: Bearing replacement ddooeess nnoott require the stator be removed. See warning

statement below.

WWAARRNNIINNGG

SSttrroonngg MMaaggnneettiicc FFiieelldd!!

SSeeppaarraattiioonn ooff tthhee ggeenneerraattoorr aanndd iittss ssttaattoorr dduurriinngg ddiissaasssseemmbbllyy wwiillll ccrreeaattee aa ssttrroonngg mmaaggnneettiicc ffiieelldd tthhaatt ccaann

iinntteerrffeerree wwiitthh ccaarrddiiaacc iimmppllaannttss ssuucchh aass ppaacceemmaakkeerrss aanndd ddeeffiibbrriillllaattoorrss..

Installation Instructions

Precedent™Generator Bearing Kit 401503

Step 1: Unit Preparation (All models)

WARNING!

Disconnect all power from the unit before proceeding. Failure to do so can result in serious personal injury or death!

1. Open and remove the Curbside and Roadside doors.

2. Open the Top Door and secure with prop rod.

3. Open the Roadside and Curbside panels.

4. Remove the Bottom Pan from the unit.

5. Remove Generator from the unit.

Figure 1. Gain access and remove generator.

RCS1264

Step 2: Disassembly Procedures

NNoonn--DDrriivvee EEnndd DDiissaasssseemmbbllyy

NNoottee:: The drain hole in the non-drive end plate must be facing up towards junction box later

during the reassembly process. Scribe identifying alignment marks onto the housing and

end plate now to aid in reassembly.

1. Use a T25 Torx bit to remove the three screws securing fan cover

to housing and remove cover.

RCS1433

T25 x3

2. Use a large flat bladed screwdriver and carefully work around

the inside edges of the fan hub until it comes off the splined

shaft.

RCS1434-1

3. Note drain hole on top of end plate faces up towards junction

box. Scribe identifying alignment marks onto the housing and

end plate to aid in reassembly.

RCS1435

4. Use a 5/16” socket to remove the four threaded rods from the

housing.

RCS1436

5. Use a large flat bladed screwdriver to separate and remove the end plate from the housing.

RCS1437

BBeeaarriinngg RReemmoovvaall

IImmppoorrttaanntt:: DDOO NNOOTT aallllooww ssttaattoorr ttoo ccoommee oouutt ooff tthhee hhoouussiinngg!! The drive end bearing is held

in the end plate by a snap ring and the assembly is press fit onto the shaft. Remove

end plate with a 3-Jaw puller.

6. 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.

RCS1459

7. Use the large 3-Jaw puller and remove the end plate from the

housing. Discard end plate.

RCS1444

8. Use a mallet and a block of wood and strike the shaft just

enough to expose the non-drive end bearing so a small 3-Jaw

puller can grab onto it.

RCS1503

9. Use a small 3-Jaw puller to remove the bearing from the shaft.

Step 3: Shaft Inspection and Cleaning

IImmppoorrttaanntt:: DO NOT use steel wool to clean generator shafts. Use Scotch-Brite™ pads (or

equivalent).

1. Clean fan shaft surfaces and thoroughly inspect the shafts

bearing and seal surfaces for damage from overheating, etc.

Bearing and seal surfaces must be smooth.

RCS1439

Note: DO NOT install new bearings if either shaft end show

signs of excessive wear or damage.

RCS1440

2. Thoroughly clean housing where end plates attach.

RCS1441

3. Remove seal and clean end plate.

RCS1442-1

Step 4: Bearing Installation and Reassembly

Procedures

IImmppoorrttaanntt:: DDOO NNOOTT aallllooww tthhee ssttaattoorr ttoo ccoommee oouutt ooff tthhee hhoouussiinngg wwhhiillee iinnssttaalllliinngg tthhee nneeww

bbeeaarriinnggss!!

DDrriivvee EEnndd

1. Install the new large bearing into the new drive end plate and

secure with the new snap ring.

RCS1445

2. Stand the generator up on its end and place a block of wood

under the shaft as shown.

a. Apply a thin bead of RTV around the sealing surface and

position new drive end plate onto housing.

b. Use the large bearing installation tool and a 32 oz. dead

blow hammer to carefully drive the end plate onto the shaft

until the bearing is fully seated.

Note: Do not attempt to drive the end plate completely flush

onto the housing. This will be done later.

RCS1460

RTV

3. With the motor still standing up on its end:

a. Fill up the end plate with grease where the shaft seal goes to

keep the seal lubricated and keep water out.

b. Apply a thin coating of grease around the new lip seal and

install into the end plate followed by the new end seal.

RCS1960-1

4. Use a 32 oz. dead blow hammer and a small bearing installation

tool to carefully drive the new bearing onto the shaft.

RCS1450

NNoonn--DDrriivvee EEnndd

5. Apply a thin bead of RTV around the outside edges of the end

plate and place the pre-loading washer inside the center of the

plate.

RCS1461

RTV

6. Correctly orientate the end plate to the housing by using the

marks that were scribed during disassembly.

Important: Be sure the drain hole faces UP when end plate is

reinstalled.

RCS1451

7. Use a plastic or rubber ended mallet and tap around the end

plate until it is flush with the housing.

RCS1453

8. Apply blue thread locker to the ends of the new threaded rods

and loosely reinstall into the housing.

RCS1455

9. Use a plastic or rubber ended mallet and tap around the drive

end plate to help seat the plate while tighten rods in a 3-step

increments until reaching 49 in-lb (5.5 N•m).

RCS1447

10. Apply a thin coating of grease around the new seal lip and install

into end plate.

RCS1454

11. Use a plastic or rubber ended mallet and tap the fan back onto

the shaft.

RCS1456

12. Apply blue thread locker to the 3 screws, reinstall fan cover and

tighten to 44 in-lb (5 N•m).

RCS1457

T25 x3

13. Reinstall key into shaft. Generator is now ready to be reinstalled into unit.

RCS1458

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Thermo King Precedent™ Generator Bearing Kit 401503 Installation guide

Thermo King Precedent™ Generator Bearing Kit 401503 Installation guide

Thermo King Precedent™ Generator Bearing Kit 401503 Installation guide

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