1993 VOLKSWAGEN CORRADO Repair Manual

A/C COMPRESSOR OIL CHECKING
Article Text (p. 7)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
Altima ..................... (4) 6.8 ................ 25-28
Maxima ..................... (5) 6.8 ................ 30-33
Pathfinder & Pickup ........ (4) 6.8 ................ 26-30
Quest
Front A/C .................... 7.0 ..................... 36
Front & Rear A/C ............. 10 ...................... 56
Sentra & NX .................. 6.8 .................. 23-26
240SX ........................ 8.0 .................. 29-32
300ZX ........................ 6.8 .................. 26-30
Porsche
911 America Roadster, RS
America & Carrera 2/4 ........ 4.6 ............... (6) 29.5
Saab
900 .......................... 5.9 .................. 34-36
9000 ......................... 6.6 .............. (3) 33-34
Subaru
Impreza ...................... 6.1 .................. 23-26
Legacy
Zexel ...................... (2) 2.4 ................ 29-32
Calsonic ................... (2) 3.2 ................ 29-32
Loyale ..................... (2) 2.4 ................ 26-28
SVX ........................ (2) 2.4 ............ (7) 22-23
(1) - Total system capacity, unless otherwise noted.
(2) - Compressor refrigerant oil capacity.
(3) - Use SUN PAG 56 refrigerant oil.
(4) - Use R-134a refrigerant and Type "R" Oil (Part
No. KLH00-PAGR0).
(5) - Use R-134a refrigerant and Type "S" Oil (Part
No. KLH00-PAGS0).
(6) - Use R-134a refrigerant and Nippondenso ND8 refrigerant oil.
(7) - Use R-134a refrigerant and ZXL100 PG (DH-PS) Type "S"Oil (Part
No. K0010PS000).ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄREFRIGERANT OIL & REFRIGERANT CAPACITY (SUZUKI THROUGH VOLVO)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ (1) Oil Refrigerant
Application Ounces Ounces
Suzuki
Samurai .................... 2.0-3.4 ................... 18
Sidekick ................... 2.0-3.4 ................ 21-23
Swift ...................... 2.0-3.4 ................... 18
Toyota
Camry ...................... (2) 3.5 ................ 32-35
Celica ..................... 3.4-4.1 ................ 24-27
Corolla .................... 3.4-4.1 ................ 25-28
Land Cruiser ............... 3.4-4.1 ................ 30-34
MR2 ........................ 3.4-4.1 ................ 28-32
Paseo ...................... 3.4-4.1 ................ 25-28
Pickup ..................... 3.4-4.1 ................ 24-29

A/C COMPRESSOR OIL CHECKING
Article Text (p. 8)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
Previa
Without Rear A/C ........... 3.4-4.7 ................ 32-35
With Rear A/C .............. 3.4-4.7 ................ 41-44
Supra ...................... (2) 4.1 ............ (3) 23-27
Tercel ..................... 3.4-4.1 ................ 25-28
T100 ....................... 3.4-4.1 ............ (3) 21-25
4Runner .................... 3.4-4.1 ................ 27-30
Volkswagen
Cabriolet .................... 4.6 .............. 30.0-31.8
Corrado SLC ................ 3.9-4.4 ............ 35.0-36.8
EuroVan
Without Rear A/C ............. 4.6 .............. (4) 34-35
With Rear A/C ................ 8.2 .............. (4) 48-49
Fox .......................... 5.7 .................. 41-42
Golf, GTI & Jetta ............ 3.9 .............. (4) 28-30
Passat ..................... 3.9-4.4 ........ (4) 41.0-42.8
Volvo
240 .......................... 7.4 ................. (5) 26
850
Cold Climates ................ 7.0 ................. (5) 29
Hot Climates ................. 7.0 ................. (5) 26
940 & 960
Sanden SD-510 ................ 4.8 .............. (6) 32-34
Sanden SD-709 ................ 8.5 .............. (6) 32-34
Seiko-Seiki .................. 7.8 .............. (6) 32-34
(1) - Total system capacity, unless otherwise noted.
(2) - Compressor refrigerant oil capacity.
(3) - Use R-134a refrigerant and ND-Oil 8 (Part No. 38899-
PR7-003).
(4) - Use R-134a refrigerant and SP-10 PAG Oil (Part No. G 052
154 A2).
(5) - Use R-134a refrigerant and ZXL 100 PG Oil (Part No.
8708581-7).
(6) - Use R-134a refrigerant and PAG Oil (Part No. 8708581-9).ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ REFRIGERANT OIL
Only NEW, moisture-free refrigerant oil should be used in the
air conditioning system. This oil is highly refined and dehydrated so
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 from
the air will be absorbed into the refrigerant oil.
SERVICING PRECAUTIONS
DISCHARGING SYSTEM
Discharge A/C system using approved refrigerant
recovery/recycling equipment. Always follow recovery/recycling
equipment manufacturer's instructions. After refrigerant recovery

A/C COMPRESSOR OIL CHECKING
Article Text (p. 9)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
process is completed, the amount of compressor oil removed must be
measured and the same amount added to A/C system.
DISCONNECTING LINES & FITTINGS
After system is discharged, carefully clean area around all
fittings to be opened. Always use 2 wrenches when tightening or
loosening fittings. Some refrigerant lines are connected with a
coupling. Special tools may be required to disconnect lines. Cap or
plug all openings as soon as lines are removed. DO NOT remove caps
until connections of lines and fittings are completed.
CONNECTING LINES & FITTINGS
NOTE: All R-134a based systems use 1/2-16 ACME threaded fittings.
Ensure all replacement parts match the connections of the
system being worked on.
Always use a new gasket or "O" ring when connecting lines or
fittings. Coat "O" ring with refrigerant oil and ensure it is not
twisted during installation. Always use 2 wrenches to prevent damage
to lines and fittings.
PLACING SYSTEM IN OPERATION
After component service or replacement has been completed and
all connections have been made, evacuate system thoroughly with a
vacuum pump. Charge system with proper amount of refrigerant and
perform leak test. See REFRIGERANT OIL & REFRIGERANT SPECIFICATIONS
article in GENERAL SERVICING for system capacities. Check all fittings
that have been opened. After system has been leak tested, check system
performance.
NOTE: Most compressors are pre-charged with a fixed amount of
refrigerant (shipping) oil. Drain compressor oil from new
compressor and add refrigerant oil to new compressor
according to amount removed from old compressor. Always
refer to underhood A/C specification label or A/C compressor
label while servicing A/C system.
ATSUGI
ROTARY VANE
1) Before checking and adjusting oil level, operate engine at
1200 RPM. Set controls at maximum cooling and high blower motor speed
for 10 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Drain compressor oil through
compressor discharge port and measure oil amount.
3) If amount drained is less than 3 ounces, conduct leak
tests at system connections. Repair or replace faulty parts as

A/C COMPRESSOR OIL CHECKING
Article Text (p. 10)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
necessary. Check purity of oil and adjust oil level as follows.
4) If amount drained is 3 ounces or more, oil level is okay.
Fill with same amount drained, using new oil. If amount drained is
less than 3 ounces, pour in 3 ounces of new refrigerant oil.
COMPONENT REFRIGERANT OIL CAPACITIES (ATSUGI ROTARY VANE)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ....................................... 1.0-1.7
Evaporator ...................................... 1.5-2.5
Receiver-Drier .................................. 0.5-0.8
Refrigerant Lines (1) ........................... 1.0-1.7
(1) - Add only if a refrigerant oil leak is indicated.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ BOSCH
6-CYLINDER
1) Before checking and adjusting oil level, operate
compressor at engine idle speed, and set controls at maximum cooling
and high blower motor speed for 20-30 minutes to return oil to
compressor.
2) Stop engine and discharge refrigerant. See SERVICING
PRECAUTIONS. Remove refrigerant oil level inspection plug on side of
compressor. Oil should be at lower lip of threaded hole. If oil level
is low, add new refrigerant oil as necessary. Replace inspection plug
and tighten to 10-12 ft. lbs. (14-16 N.m).
CALSONIC
V5 5-CYLINDER & V6 6-CYLINDER
Infiniti & Nissan
1) Before checking and adjusting oil level, operate engine at
1200 RPM. Set controls at maximum cooling and high blower motor speed
for 10 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant. See SERVICING
PRECAUTIONS. Measure the amount of oil drained/discharged into
refrigerant recovery/recycling equipment.
3) Remove compressor from vehicle. Drain compressor oil from
compressor drain plug and measure oil amount. Add this amount to
amount drained in step 2), to obtain total amount drained.
4) Fill compressor with total amount drained, using new oil.
If any major components of the system were also replaced, determine
the amount of additional oil needed. See appropriate COMPONENT
REFRIGERANT OIL CAPACITIES table for specified amount.
COMPONENT REFRIGERANT OIL CAPACITIES (CALSONIC V5)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ

A/C COMPRESSOR OIL CHECKING
Article Text (p. 11)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
Component Ounces
Condenser ........................................ 1.0-1.7
Evaporator ....................................... 1.5-2.5
Receiver-Drier ................................... 0.5-0.8
Refrigerant Lines (1) ............................ 1.0-1.7
(1) - Add only if a refrigerant oil leak is indicated.ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄCOMPONENT REFRIGERANT OIL CAPACITIES (CALSONIC V6)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ............................................ 2.5
Evaporator ........................................... 2.5
Receiver-Drier ....................................... 0.2
Refrigerant Lines (1) ................................ 1.0
(1) - Add only if a refrigerant oil leak is indicated.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ Subaru
1) Before checking and adjusting oil level, operate engine at
1000-1500 RPM. Set controls at maximum cooling and high blower motor
speed for 20 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Drain compressor oil from
compressor drain plug and measure oil amount.
3) Fill compressor with total amount drained, using new oil.
If any major components of the system were also replaced, determine
the amount of additional oil needed. See appropriate SUBARU COMPONENT
REFRIGERANT OIL CAPACITIES table for specified amount.
SUBARU COMPONENT REFRIGERANT OIL CAPACITIES (LEGACY)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Compressor ........................................... 2.4
Condenser ............................................ 1.7
Evaporator ........................................... 2.4
Refrigerant Lines (1) ................................ 1.7
(1) - Add only if a refrigerant oil leak is indicated.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄSUBARU COMPONENT REFRIGERANT OIL CAPACITIES (SVX)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Compressor ........................................... 2.4
Condenser ............................................ 1.7

A/C COMPRESSOR OIL CHECKING
Article Text (p. 12)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
Evaporator ........................................... 2.4
Refrigerant Lines (1) ................................ 1.7
(1) - Add only if a refrigerant oil leak is indicated.ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ DIESEL KIKI
ROTARY VANE
1) Before checking and adjusting oil level, operate engine at
800-1000 RPM. Set controls at maximum cooling and high blower motor
speed for 20 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Remove oil drain plug and
measure amount of oil drained.
3) If amount drained is less than 3 ounces (1.7 ounces on Geo
Storm), conduct leak tests at system connections. Repair or replace
faulty parts as necessary.
4) If amount drained is more 3 ounces (1.7 ounces on Geo
Storm), oil level is okay. Fill compressor with same amount drained,
using new oil. If amount drained is less than 3 ounces (1.7 ounces on
Geo Storm), pour in 3 (1.7) ounces of new refrigerant oil.
5) When replacing other A/C system components, add the
following amount(s) of refrigerant oil. See COMPONENT REFRIGERANT OIL
CAPACITIES (DIESEL KIKI ROTARY VANE) table.
COMPONENT REFRIGERANT OIL CAPACITIES (DIESEL KIKI ROTARY VANE)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ............................................... 1.7
Evaporator .............................................. 1.0
Receiver-Drier .......................................... 1.0
Refrigerant Lines ....................................... 0.3
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ 5 & 6-CYLINDER
1) Before checking and adjusting oil level, operate engine at
800-1000 RPM. Set controls at maximum cooling and high blower motor
speed for 20 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Remove oil drain plug and
measure amount of oil drained.
3) If amount drained is less than 3 ounces, conduct leak
tests at system connections. Repair or replace faulty parts as
necessary.
4) If amount drained is more 3 ounces, oil level is okay.
Fill compressor with same amount drained, using new oil.
5) When replacing other A/C system components, add the
following amount(s) of refrigerant oil. See COMPONENT REFRIGERANT OIL

A/C COMPRESSOR OIL CHECKING
Article Text (p. 13)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
CAPACITIES (DIESEL KIKI 5 & 6-CYLINDER) table.
COMPONENT REFRIGERANT OIL CAPACITIES (DIESEL KIKI 5 & 6-CYLINDER)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser .................................................. 1.0
Evaporator ................................................. 1.7
Receiver-Drier ............................................. 1.0
Refrigerant Lines .......................................... 0.3
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ FORD
FX-15 10-CYLINDER
1) Slowly discharge system. See SERVICING PRECAUTIONS. Remove
A/C compressor. Drain compressor oil from suction and discharge ports.
Measure amount drained and discard oil.
2) If amount drained from removed (old) compressor is between
3 and 5 ounces, add drained amount of new refrigerant oil into the NEW
compressor through suction port.
3) If amount drained is less than 3 ounces, add 3 ounces to
the NEW compressor. If amount drained is more than 5 ounces, add 5
ounces. Use new "O" rings on refrigerant lines. Install A/C
compressor. Evacuate and recharge system. Perform leak test.
4) When replacing other A/C system components, add the
following amount(s) of refrigerant oil. See COMPONENT REFRIGERANT OIL
CAPACITIES (FX-15 10-CYLINDER) table.
COMPONENT REFRIGERANT OIL CAPACITIES (FX-15 10-CYLINDER)
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ............................................ 1.0
Evaporator ........................................... 3.0
Receiver-Drier ................................... (1) 2.0
Refrigerant Lines ................................ (2) 1.0
(1) - On Hyundai Sonata and Mazda Navajo, drain oil from old
receiver-drier. Add amount drained to amount specified.
(2) - Add only if a large oil leak is indicated.
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ HADSYS
7-CYLINDER
Honda (Accord)
1) Discharge system. See SERVICING PRECAUTIONS. Remove
compressor from vehicle. Drain all oil from NEW compressor and fill
compressor with 4 ounces of clean refrigerant oil.

A/C COMPRESSOR OIL CHECKING
Article Text (p. 14)
1993 Volkswagen Corrado
For Volkswagen Technical Site: http://vw.belcom.ru
Copyright © 1998 Mitchell Repair Information Company, LLC
Wednesday, March 22, 2000 08:47PM
2) Add one ounce of refrigerant oil when replacing
evaporator. Add1/2 ounce when replacing condenser. When replacing
receiver-drier or hoses, add 1/3 ounce per component replaced.
HARRISON
R4 4-CYLINDER
1) Before checking and adjusting oil level, operate engine at
800-1000 RPM. Set controls at maximum cooling and high blower motor
speed for 20 minutes to return oil to compressor.
2) Stop engine. Discharge refrigerant and remove compressor
from vehicle. See SERVICING PRECAUTIONS. Remove oil drain plug and
measure amount of oil drained.
3) If amount drained is less than one ounce, conduct leak
tests at system connections. Repair or replace faulty parts as
necessary. Fill compressor with 2 ounces, using new refrigerant oil.
4) If amount drained is more one ounce, oil level is okay.
Fill compressor with same amount drained, using new oil.
5) When replacing other A/C system components, add the
following amount(s) of refrigerant oil. See COMPONENT REFRIGERANT OIL
CAPACITIES (HARRISON R4 4-CYLINDER) table.
COMPONENT REFRIGERANT OIL CAPACITIES (HARRISON R4 4-CYLINDER)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄComponent Ounces
Condenser ............................................... 1.0
Evaporator .............................................. 1.7
Receiver-Drier .......................................... 1.0
Refrigerant Lines ....................................... 0.3
ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ V5 5-CYLINDER
1) If system is operable, run A/C system for several minutes
to stabilize system. Turn off engine. Discharge system and remove
compressor. See SERVICING PRECAUTIONS. Remove drain plug and measure
oil.
2) If one ounce or more is drained, add same amount. If less
than one ounce is drained, add 2 ounces of new refrigerant oil to
compressor.
3) If condenser is replaced, add one ounce. Add 3.5 ounces if
accumulator is replaced. If evaporator is replaced or if a large
refrigerant leak occurred, add 3 ounces of new refrigerant oil.
HITACHI
6-CYLINDER
1) Before checking and adjusting oil level, operate
compressor at 1000-1500 engine RPM, and set controls at maximum