Product Manual

Section 13 - Service / Maintenance

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Maintenance - Air Pre-Heater

(cont.)

6. Clean all parts using a parts washer

s All passages must be thoroughly cleaned with a brush.

7. Replace Nozzle Assembly and Quad Ring

s After cleaning air pre-heater assembly, blow dry.

s Install new quad ring (4). Before inserting quad ring in air pre-heater block, a light coat

of oil should be applied. NOTE: Make sure quad ring is properly seated in block before

proceeding (see page 40 for clarification).

s Apply a light coat of oil to the shaft of the new nozzle assembly (3). Carefully insert new

nozzle assembly (3) through the quad ring and into the block. Hand tighten gently.

s Check alignment of ignitors and adjust if necessary (see page 39).

8. Re-install O-rings and Plunger

s Insert 1/4" o-ring (10) and 11/16" o-ring (11) into the air pre-heater block (5).

s Insert plunger

into air pre-heater block spring end first.

9. Re-install Cartridge Heater

s Apply pipe dope to cartridge heater threads. Insert cartridge heater into air pre-heater

block and tighten.

10. Re-install Adapter Assembly

s Align the holes of the adapter assembly (16) with those on the air pre-heater block (5).

NOTE: Make sure the small end of the adapter pin is facing toward the air pre-heater

block.

s Attach the Adapter assembly (16) to the block using two hex cap screws (17). Tighten

screws.

11. Re-install Diaphragm

s Re-attach diaphragm assembly and hand tighten. NOTE: Do not over tighten.

12. Replace Ignitor Assembly (see page 39)

13. Service Oil Pre-Heater (see pages 33-37 for Annual Maintenance Instructions)

THE ENTIRE PRE-HEATER ASSEMBLY IS AVAILABLE

PART# 9812