Cub Cadet 8454 Service Manual page 332

CHAPTER 9 8454
4. Poor extension valve
Status: Not cool
Phenomena:
- The pressure of high /low pressure side is high.
Cause: Poor extension valve, poor control of refrig-
erant flow rate by poor assembling of the wound
box.
Action: Check the assembly status, location and in-
sulation status of the wound box. With no failure,
replace the extension valve.
Low poor extension
valve
High poor extension
valve
b. Not Cool (some times cool)
1. Poor compression of the compressor
Status: Not cool
Phenomena:
- The pressure of low pressure side is high and
the pressure of high pressure side is very low.
- When stopping the operation, the pressure of
high/low pressure
immediately.
Cause: Poor gasket of compressor, poor compres-
sor caused by the broken suction valve.
Action: Disassemble and repair the compressor.
Low poor compression
of the compressor
High poor compres-
sion of the compressor
2. Moisture mixing
Status: Sometimes cold, sometimes not cold
Phenomena:
- The pressure of low pressure side is sometimes
negative or sometimes returning normal.
Cause: The moisture inside refrigerating cycle is
frozen which makes the cycle closed in the exten-
sion valve and return to the normal by melting of
ice.
Action: Replace the receiver drier.
Repeat the vacuum working 2 ~ 3 times. Charge
the proper amount of refrigerant.
Low moisture mixing in
the refrigerating cycle
High moisture mixing
in the refrigerating cycle
9-18
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
2.3 kgf/cm 2
32.7 psi
19 ~ 20 kgf/cm 2
270.2 ~ 284.5 psi
shall be the same
2
4 ~ 6 kgf/cm
56.9 ~ 85.3 psi
2
7 ~ 10 kgf/cm
99.6 ~ 142.2 psi
2
- ~ 1.5 kgf/cm
- ~ 21.3 psi
2
6 ~ 16 kgf/cm
85.3 ~ 227.6 psi
569W923A
569W924A
569W925A
D569-W02 May-2003