ra
N:10:04
Heating and Air Conditioning
Step 3 — Insert the dipstick to its STOP position.
(Use Figure above as a guide.) The STOP is the
angle near the top of the dipstick.
Fig.
66
• Point of the angle must be to the left, if
mounting angle is to the right.
• Point of the angle must be to the right, if
mounting angle is to the left.
• The bottom surface of the angle, in either case,
must be flush with the surface of the oil filler
hole.
Step 4 — Remove
dipstick,
oil.
Count increments of
Step 5 — Use the table below to determine the
correct oil level for the mounting angle of the
compressor.
Step 6 — If the increments read on the dipstick do
not match the table, add or subtract oil to the mid-
range value. For example, if the mounting angle of
the SD-508 is 10°, and the dipstick increment is 3,
add oil in one (1) fluid ounce increments until 7 is
read on the dipstick.
Mounting Angle
Degree
0
10
20
30
40
50
SO
90
Acceptable Oil Level
in Increments
SOS
4-6
6-8
8-10
10-11
11-12
12-13
12-13
15-16
S07
3-5
5-7
8-8
7-9
8-10
8-10
9-11
9-11
508
4-6
6-8
7-9
8-10
9-11
9-11
9-12
9-12
510
2-4
4-5
5-6
6-7
7-9
9-10
10-12
12-13
Step 7 — Install the oil filler
plug.
• First check that the sealing "0" ring is not
twisted.
• Seat and
"O"
ring must be clean.
• Torque plug to 6-9 foot-pounds (0.8-1.2
kg-m).
Do not overtighten the plug to stop a
leak. Remove the
plug.
Install a new
"O"
ring.
Procedure B
It is not necessary to check the oil level as
routine maintenance. However, should there
be good reason to suspect an incorrect oil level
or it is specified in a diagnosis procedure to
check the oil, follow these steps:
Step 1 — Run the compressor for 10 minutes at
engine idle RPM.
Step 2 - Recover all
Refrigerant-12
from the
system.
Be careful not to lose oil.
Step 3 — Proceed with Steps 1 through 7 in
Procedure A above.
SHAFT TURNING SMOOTHNESS TEST
(Compressor Installed)
Step 1 — Disconnect refrigerant hoses.
Step 2 — Disengage clutch.
Step 3 — Uncap fittings.
Step 4 — Rotate compressor shaft, using
3
/*"
socket and wrench on shaft nut.
Step 5
—
While rotating, if severe rough spots or
"catches" are felt, replace the compressor.
CLUTCH TEST
Step 1 —
If
field coil lead wire is broken, replace
field
coM.
Step 2 — Check amperage and voltage. The
amperage range requirement is 3.6 to 4.2 at 12
volts.
Note the following symptoms and remedies:
• A very high amperage reading — A short within
the field
coil.
• No amperage reading — An open circuit in the
winding.
• An intermittent or poor system ground results in
lower voltage at the clutch. Check for tight fit of
coil retaining snap ring or coil retaining screws
for good ground. Consult Systems Manual to
determine proper system ground.
• Replace field coil for open or short circuit.
Step 3 — Air Gap — An incorrect air gap could
cause erratic engagement or disengagement
and/or clutch rattle. Check the air gap with a feeler
gauge (.016"-.031"). Adjust based on Clutch
Service Section, page
N:
10:09.
Step 4
—
Suspected Bearing Noise — Do the
following:
• Remove belt. Disengage clutch.
• Rotate rotor pulley by hand.
• Listen for bearing noise. Feel for hard spots. If
excessive, replace rotor pulley and clutch front
plate assembly or bearing set.
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