Operating instructions

MAINTENANCE
980076 08/26/03 4-11
DO NOT service this unit
while it is running. The high-
speed mechanical parts as well as high
temperature components may result in severe
injury, severed limbs, or fatality.
The following general instructions are for the repair
of various components. ONLY FULLY TRAINED
personal should repair components.
GASOLINE ENGINE
Refer to the Operation and Maintenance MANUAL.
If more detail is needed, you should procure a
Service and Repair book from your local authorized
Briggs and Stratton Service center.
VACUUM PUMP
Refer to the Vacuum Pump Maintenance Manual.
WATER PUMP
Refer to the Pump Maintenance Manual.
BURNER FUEL PUMP
The fuel oil pump, when applied correctly, will
require no repair; however, if in the course of normal
maintenance, you have a very dirty inlet filter,
proceed as follows:
1. Remove fuel pump cover.
2. Remove the strainer and clean with a brush
using clean kerosene.
3. Re-assemble the pump.
BURNER BEARING
The burner bearing on your unit may be removed if
defective. Proceed as follows after removing the
impeller and pulley from the shaft.
1. Remove the internal snap rings on each end of
bearing.
2. Using an arbor press and pressing down on the
cone side, press out the bearing.
3. Replace the snap ring on the cone end.
CAUTION: When replacing this bearing, always
press on the outside race of the bearing.
PRESSURE ON THE SHAFT WILL RUIN THE
BEARING.
4. Press the new bearing into the plate coupling
until it reaches the snap ring on the cone end.
5. Re-install the internal snap ring on the plate
side.
BURNER IMPELLER
The burner impeller; may be changed. After the
burner bearing and plate have been removed,
proceed as follows:
1. Clamp the burner pulley in a vise.
CAUTION: DO NOT CLAMP THE PLATE, as
the seals in the bearing will be damaged when
changing the impeller.
2. Remove the flexible coupling end, and the
external snap ring inside the impeller.
3. Loosen the set screw on the impeller hub, the
impeller may now be removed.
4. Reassemble with new impeller.