Mitsubishi Montero (1991+). Manual - part 12

         HITACHI 5-CYL DRAIN & REFILL

         1) Before checking and adjusting oil level, operate

compressor at 1000-1500 engine RPM, and set controls at maximum

cooling and high blowing speed for about 10 minutes to return oil to

compressor.

         2) Stop engine. Discharge refrigerant and remove compressor

from vehicle. See SERVICING PRECAUTIONS at the beginning of this

article. Drain oil from compressor through suction port. Measure

amount of oil drained.

         3) If amount drained is more than 2.4 ounces, fill with same

amount using new oil. If amount drained is less than 2.4 ounces, fill

with 2.4 ounces. Install compressor and recharge.

         4) If A/C components are replaced. add refrigerant oil to

system. Add 1.7 ounces if condenser is replaced. Add 2.4 ounces if

evaporator is replaced. oil does not need to be added if receiver-

drier is replaced.

         HITACHI 6-CYL DRAIN & REFILL

         1) Before checking and adjusting oil level, operate

compressor at engine idling speed, with controls set for maximum

cooling and high blower speed, for 10 minutes to return oil to

compressor.

         2) Stop engine, discharge refrigerant and remove compressor

from vehicle. See SERVICING PRECAUTIONS at the beginning of this

article. Drain oil from compressor suction port. Measure amount of oil

drained. If amount drained was more than 2.4 ounces, refill with same

amount of new oil. If amount drained was less than 2.4 ounces, refill

with 2.4 ounces. Install compressor and recharge.

         MATSUSHITA ROTARY VANE DRAIN & REFILL

         Discharge system. Remove compressor from vehicle. Drain oil

from compressor through inlet and outlet holes. Refill compressor with

3.4-4.7 ounces of oil through suction port. When replacing evaporator,

add 2 ounces. When replacing other A/C components, add 1.4 ounces per

component replaced.

         NIPPONDENSO ROTARY VANE DRAIN & REFILL

         1) Before checking and adjusting oil level, operate

compressor at engine idle speed, and set controls at maximum cooling

and high blowing speed for 20-30 minutes to return oil to compressor.

         2) Stop engine. Discharge refrigerant and remove compressor

from vehicle. See SERVICING PRECAUTIONS at the beginning of this

article. Drain compressor oil through compressor intake and discharge

ports. Measure amount drained. Oil may be hard to drain if compressor

cool. Drain compressor while compressor is warm.

         3) If amount drained is less than 2.4 ounces, conduct leak

tests at system connections. If necessary, repair or replace faulty

parts. Check purity of oil level and adjust oil level as follows.

         4) If amount drained is more than 2.4 ounces, oil level is

okay; fill with same amount drained using new oil. If amount drained

is less than 2.4 ounces, pour 2.4 ounces of new refrigerant oil.

         5) When replacing condenser, add one ounce. when replacing

other A/C components, add .33 ounce per container replaced.

         NIPPONDENSO 6 & 10-CYL DRAIN & REFILL

         When inspecting system for oil loss, look for signs of

leaking (shiny, wet spots on components or underside of hood). If oil

leak is noted or component replacement is required, use the following

procedure as indicated:

         NO OIL LEAK

         Discharge system and change components as necessary. See

SERVICING PRECAUTIONS at the beginning of this article. Add

refrigerant oil to components as necessary.

         OIL LEAK

         1) Slowly discharge system. Repair or replace faulty

components. If equipped with a drain plug, remove plug, drain and

discard oil. If not equipped with a drain plug, remove compressor from

vehicle and pour oil out suction and discharge ports.

         2) Replace drain plug (if equipped). Add 1.5 ounces of new

refrigerant oil through suction port. Use new gaskets or "O" rings

when replacing suction and discharge lines.

         COMPRESSOR FAILURE OR SYSTEM CONTAMINATED

         If either situation exists, discharge system and remove

compressor, receiver-drier and expansion valve. Clean expansion valve

screen. Flush entire system. Install new compressor and receiver-

drier. New compressors contain correct amount of oil. If installing

overhauled compressor, add 1.5 ounces of new refrigerant oil through

suction port.

         PANASONIC ROTARY VANE DRAIN & REFILL

         1) Before checking and adjusting oil level, operate

compressor at 1000-1500 engine RPM, and set controls at maximum

cooling and high blowing speed for about 10 minutes to return oil to

compressor.

         2) Stop engine. Discharge refrigerant and remove compressor

from vehicle. See SERVICING PRECAUTIONS at the beginning of this

article. Drain oil from compressor through suction and discharge

ports. Measure amount of oil drained. If amount drained is more than

2.4 ounces, fill with same amount using new oil. If amount drained is

less than 2.4 ounces, fill with 2.4 ounces. Install compressor and

recharge.

         3) If A/C components are replaced, add refrigerant oil to

system. Add 1.4 ounces if condenser is replaced. Add 2 ounces if the

evaporator is replaced. Oil does not need to be added if receiver-

drier is replaced.

         SANDEN SCROLL DRAIN & REFILL

         Discharge system. Remove compressor from vehicle. Drain oil

from compressor through inlet and outlet holes. Refill compressor with

2.8 ounces of oil through suction port. When replacing condenser,  add

.5 ounce. When replacing evaporator, add 1.7 ounces. When replacing

other A/C components, add .5 ounce per component replaced.

         SANDEN 5-CYL DRAIN & REFILL

         1) Discharge system. Remove compressor belt and loosen

mounting bolts. Rotate compressor in brackets until filler plug is at

top. Clean area around filler plug and remove plug slowly. Rotate

front hub plate so notch in lobe is 110 degrees from the bottom. This

rotates ball end of top piston to align with oil fill port and allows

clearance for dipstick. See Fig. 1.

         2) Insert compressor dipstick diagonally from right to left

until stop on dipstick contacts filler plug surface. Remove dipstick

and note oil fill level. Each increment on dipstick represents one

ounce of oil. Add oil if necessary to reach 3-4 ounce level.

Fig. 1:  Sanden 5-Cylinder Oil Level Checking

Courtesy of Sanden International U.S.A, Inc.

         SANDEN 7-CYL DRAIN & REFILL

         1) Before checking and adjusting oil level, operate

compressor at engine idle speed, and set controls at maximum cooling

and high blowing speed for 20-30 minutes to return oil to compressor.

         2) Stop engine. Discharge refrigerant and remove compressor

from vehicle. See SERVICING PRECAUTIONS at the beginning of this

article. Remove oil drain plug and drain oil. Measure amount of oil

drained. Install drain plug with new "O" ring.

         3) If amount drained is more than 3 ounces, fill with same

amount using new oil. If amount drained is less than 3 ounces, fill

with 3 ounces. Install filler plug. Install compressor and recharge

system.

A/C COMPRESSOR SERVICING 



1991 Mitsubishi Montero

         1991 GENERAL SERVICING

         Compressor Service

         * PLEASE READ THIS FIRST *

CAUTION: When discharging air conditioning system, use only approved

         refrigerant recovery/recycling equipment. Make every attempt

         to avoid discharging refrigerant into the atmosphere.

         ISOLATING COMPRESSOR

NOTE:    Only compressors with stem-type service valves can be

         isolated.

         1) Connect service gauge set to the compressor service valves

and open compressor valves slightly (turn in clockwise). Start engine

and operate air conditioning. Slowly turn compressor suction valve

clockwise toward closed (front-seated) position.

         2) When suction pressure is reduced to zero or less, turn off

engine and compressor and quickly turn suction valve stem in to full

front-seated position. Suction pressure should be slightly above zero.

Turn discharge valve into front-seated position.

         3) To check oil level, slowly open compressor crankcase plug

to relieve any remaining pressure. After oil level is corrected, cap

service gauge ports on both valves. Back-seat suction service valve to

allow refrigerant to enter compressor. Open discharge valve halfway.

         4) Loosen discharge service valve cap, allowing refrigerant

pressure to force air out of compressor. Back-seat service valve and

tighten cap. Compressor is now ready for operation.

         REFRIGERANT OIL

         Only new, pure, moisture-free refrigerant oil should be used

in the air conditioning system. This oil is highly refined and

dehydrated to a point where moisture content is less than 10 parts per

million. The oil container must be tightly closed at all times when

not in use, or moisture will be absorbed into the refrigerant oil from

the air.

         DISCHARGING SYSTEM PRECAUTIONS

CAUTION: When discharging air conditioning system, use only approved

         refrigerant recovery/recycling equipment. Make every attempt

         to avoid discharging refrigerant into the atmosphere.

         If compressor has stem-type service valves, it can be

isolated and removed without discharging entire system. Otherwise,

discharge system completely using approved refrigerant

recovery/recycling equipment before loosening any fittings.

         DISCONNECTING LINES & FITTINGS TEST

         After system is discharged, carefully clean area around all

fittings to be opened. Always use 2 wrenches when tightening or

loosening fittings to avoid twisting or distorting lines. Cap or plug

all openings as soon as lines are removed. Do not remove caps until