Takeuchi TB175W, Руководство по ремонту

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III-61 TB175W
C. Drive Belt – The drive belt should be tight and in good condition. Use
a belt tension gauge to check tension (120 pounds maximum). With experi-
ence, you can feel belt tension by twisting the belt. Try feeling belt tension
after using the gauge, when you know the tension is correct. Replace belts if
they are frayed or look worn.
If the clutch pulley/belt alignment is obviously off, you need to loosen
the compressor or mounting bracket, or both—and use the alignment bar to
line up the clutch pulley with the drive pulley. Tighten compressor mounting
bolts first, then the bolts holding the bracket. The mounting bracket should
have slots or other means of adjustment to allow you to adjust the tension of
the drive belt. When you use a pry bar to apply tension, be sure you do not
pry against the compressor. Pry against the mounting bracket.
3. Check Hoses and Fittings
Check all hoses and fittings. Look for places where hoses flex when the cab is
tilted. Any places the hoses or fittings are fastened, clamped, connected, bent or
secured are potential wear points. This also applies to places where hoses are not
clamped or supported but should be (often near the condenser). All of these spots
are potential leak or damage points. Tighten, re-fasten, add, or replace as indi-
cated by your inspection.
4. Check for Refrigerant Leaks
System refrigerant leaks can be anywhere but there are obvious places. You can
spot some by looking for signs of refrigerant oil forced out with refrigerant leak-
age. One location leaks frequently occur is the compressor shaft seal. The shaft
and seal are hidden behind the clutch assembly, but centrifugal force will throw
the oil off the shaft and against the engine, bracket or whatever is close. Check
these points when you examine the compressor clutch and mounting bracket. A
solution of soap and water applied around potential leak points works well for
detecting leaks. A leak in the evaporator may be indicated if you feel around the
condensate drain hole and find oil present.
Note: You can add inexpensive dry nitrogen gas to the system instead
of R-12 if system pressures are low. Dispense the gas at no more
than 200-250 PSI as this is sufficient pressure to cause or indicate
a leak point in the AC system. AC service procedures for complete
system recovering of refrigerant, evacuating, and recharging are
covered and illustrated in
Chapter 9.
Note: A leaking heater core could also result in coolant at the condensate
drain.
Inspection & Maintenance