John Deere AC-375LP User Manual

Page 17

Service

Operator’s Manual

MAINTENANCE (CONTINUED):

(Fig. 3)

(Fig. 4)

(Fig. 5)

WARNING: NEVER SERVICE HEATER WHILE

IT IS PLUGGED IN, CONNECTED TO

PROPANE SUPPLY, OPERATING OR

HOT. SEVERE BURNS AND ELECTRICAL

SHOCK CAN OCCUR.

CLEANING FAN:

Clean fan every 500 hours of operation or as needed.
1. Remove screws on side cover using 5/16" nut-driver.
2. Remove side cover.
3. Detach the ﬁve motor wires from parts under heater

shell. Be sure to detach only wires coming from motor.

(Fig. 3)

The ﬁve motor wires are:
• white wire—to terminal board
• black wire—to terminal board
• blue wire—to thermal switch wire
• orange wire—to solenoid valve
• green wire—to grounding screw on shell
4. Remove fan guard from rear of heater.
5. Reach into rear of heater shell. Carefully pull motor wires

through hole in bottom of shell. (Fig. 4)

Note: Pull wires through hole one at a time.
6. Remove nuts and mounting bolts holding motor mount

to shell. Use 3/8" nut-driver and 7/16" wrench.

7. Carefully pull motor and fan out of shell.
IMPORTANT: Be careful not to damage fan. Do not set

motor and fan down with the weight resting on fan. This

could damage fan pitch.

8. Turn motor and fan around. Place motor and fan into

shell backwards.

Note: Motor will go into shell ﬁrst (Fig. 5).
9. Line up rear mounting holes in shell with ﬁrst hole on

each side of motor mount (Fig. 5).

Note: When holes are lined up, fan should be outside of

shell.

10. Holding mounting bolt, carefully reach through fan

blades into rear of heater. Be careful not to damage

fan pitch. Insert bolt through motor mount and shell.

With free hand, attach nut, ﬁnger tight. Repeat process

for other mounting hole.

11. Use 1/8" hex wrench to loosen setscrew which holds

fan to motor shaft (Fig. 6).

12. Slip fan off motor shaft.
13. Clean fan using soft cloth moistened with kerosene or

solvent.

Terminal

Board

Grounding Screw

Thermal

Switch Wire

Solenoid

Valve

Motor Wires

Mounting

Bolts

Motor

Mount

Rear

Mounting

Hole

First

Hole

Motor

Shaft

Fan

Setscrew

(Fig. 6)