126
TK 61555-2-MM-EN
Fan Shaft Assembly
The unit is equipped with a fan shaft assembly that contains special sealed bearings. The
bearings should be checked when the belt is replaced. Spin the fan shaft with the belt removed
and listen. Unusually loud bearing noise indicates the fan shaft bearings should be replaced.
Removal
1. Remove the fan drive belt. See “Fan Drive Belt” in the Engine Maintenance Chapter.
2. Remove the mounting hardware for the upper condenser inlet orifice and remove it.
3. Loosen the hub pinch bolts on the upper condenser blower, slide the blower off the fan shaft
and remove it. Make sure to remove and keep the key.
4. Loosen the hub pinch bolts on the evaporator blower so it can slide on the fan shaft.
5. Remove the fan shaft mounting bolts.
6. Remove the fan shaft while sliding the evaporator blower off the end of the fan shaft. Make
sure to remove and keep the key.
N
No
otte
e:: Make sure to avoid hitting the machined surface of the shaft against the structure
because that could cause damage, making it difficult to remove/install the bearings and
create a starting point for further corrosion.
Disassembly
1. Remove the snap ring from the condenser end.
2. Press the fan shaft out from condenser end to the evaporator end.
3. Remove the snap ring from the evaporator end.
4. Remove the bearings from the shaft by supporting the bearing and tapping on the end of the
shaft with a soft hammer. Make sure to avoid damaging the end of the shaft, which can make
it difficult to remove/install the bearings.
5. Remove the bearing from the housing with a hammer and punch.
6. Clean and inspect the parts, but do not clean the bearings in solvent. Replace the parts that
show significant wear or damage.
