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Revision A
5.11
Checking Air Conditioning and Heater
Figure 5.18: Air Conditioning (A/C) and Heater Controls
1006177
A
B
C
D
1.
Confirm that the following A/C and heating controls function properly:
•
Blower switch (A)
: Controls blower speed. Switch settings are OFF, LO, MEDIUM, and HI.
•
Air conditioning switch (B)
: Controls A/C system. When set to ON, A/C operates if blower switch (A) is switched
ON. When set to OFF, the A/C system does not operate.
•
Outside air switch (C)
: Controls air source. When set to FRESH AIR, booster fan starts and draws filtered outside air
into the cab. When set to RECIRCULATED, booster fan stops and air inside cab is recirculated.
•
Temperature control (D)
: Controls cab temperature. Turn knob clockwise to increase temperature, and turn knob
counterclockwise to decrease temperature.
IMPORTANT:
To distribute oil throughout the A/C system, perform the following steps:
2.
Start the engine and turn blower switch (A) to the LO setting then turn temperature control (D) to maximum heating,
and turn A/C switch (B) to OFF.
3.
Turn A/C switch (B) from OFF to ON position for 1 second, then back to OFF for 5 to 10 seconds. Repeat this step
ten times.
4.
Shut down the engine, and remove the key from the ignition.
