Sanden Compressor

A/C Clutch -N25-, Servicing

CAUTION:
- Do Not open A/C refrigerant system to service A/C clutch. Instead, remove compressor from mounting bracket without removing refrigerant pipes.
- Mark running direction of ribbed belt before removing. Ribbed belt could break if allowed to run in reverse direction.

Preparation
- Remove compressor from bracket:
- 4-cyl. engine.
- 6-cyl. engine.

A/C Clutch, servicing:


Sanden Compressor







NOTE: A/C clutch versions may differ slightly from illustration. Servicing procedures remain the same.

1 - Clutch plate self-locking nut
- Always replace
- 15 Nm (11 ft lb)
- Removing and installing See Fig. 1
2 - Clutch plate
- Removing See Fig. 2.
3 - Shims
- For adjusting gap between clutch plate and belt pulley
- Gap:0.4 - 0.8 mm
- Checking/adjusting gap See Fig. 5.
4 - Circlip
- Always replace
- Must be installed correctly (flat side toward compressor)
- Must be properly seated in groove
5 - Ribbed belt pulley
- Removing See Fig. 3.
- Clean contact surfaces before installing
6 - Circlip
- Always replace
- Must be installed correctly (flat side toward compressor)
- Must be properly seated in groove
7 - Magnetic coil
- Installing See Fig. 4.
- Installed with a fuse which interrupts the operation of the coil if it becomes too hot (e.g. if the compressor is not moving freely).
- Contains protection diode -J201- for suppressing voltage peaks which may occur when the A/C clutch -N25- is disengaged.
8 - Retaining clip with bolt
9 - Retaining clip
10 - Retaining clip
11 - Screw
12 - A/C Compressor
- Sanden SD7 - V16
13 - Threaded bushing







Fig. 1 Clutch plate self-locking nut, removing and installing

Tightening torque: 15 Nm (11 ft lb)

NOTE:
- Use commercially available two-pin wrench (illustrated) to counter-hold clutch plate.
- Always replace lock nut.







Fig. 2 Clutch plate, removing
-Pry off carefully using two screwdrivers -A-.

NOTE: If the clutch plate is installed too tightly, use a commercially available two-arm or three-arm puller to remove the clutch plate.







Fig. 3 Ribbed belt pulley, removing
- Attach commercially available two-arm puller -A- at shoulder -B- and remove pulley.

NOTE:
- To avoid damaging pulley when removing, make sure the puller is properly fitted to shoulder -B-.
- Clean contact surface before installing.
- If necessary, carefully tap the pulley into place using a plastic hammer and a suitable drift (applied to the bearing inner race).







Fig. 4 Magnetic coil, installing
- Fit lug -C- into recess on magnetic coil -A-.
- Make sure wiring harness -B- is correctly positioned in relation to magnetic coil -A-.







Fig. 5 Checking and adjusting gap
Gap width = difference between distance "1" and distance "2" measured as follows:
- Measure distance "1" between belt pulley and clutch plate using depth gauge -A- (at three different points).
- Apply 12 V to magnetic coil:
- B+ terminal to single-pin connector -D-
- Ground (GND) to compressor housing
- Measure distance "2" between belt pulley and clutch plate using depth gauge -A- (at three different points).

Gap width (distance "1" - distance "2") must be 0.4 - 0.8 mm.

NOTE:
- The gap width must be within the tolerances around the whole circumference.
- The gap width can also be measured without removing the compressor (compressor installed).
- If the gap width is outside the specified tolerance, remove the clutch plate and adjust the gap width by removing or adding shims.