PERFORMING PREDELIVERY CHECKS
5.11.12 Check
ing Air Conditioning (A/C) and Heater
Figure 5.46: M155/M205 A/C and Heater Controls
• Blower switch (A): Controls b lower speed. Switch settings are OFF, LO, MEDIUM, a nd HI.
• Air conditioning switch (B): Controls A/C system. Wh en se t to O N, 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.
IMPOR
TANT:
To di
stribute oil throughout the A/C system, perform the following steps after starting a machine that has been
stor
ed for m ore than one week:
1. Start engine and turn blower switch (A) to the first position, turn temperature control (D) to maximum heating,
andturnA/Cswitch(B)toOFF.
2. 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.
147962 350 Revision A
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