replacement of this one. (CLEAN POINT IS MAY 2015).
Do not install the clutch at this step. This will be done further in the
bulletin.
Date code engraving location has changed beginning of 2015
(image below).

WB15-48
Page 7 / 19

LANG clutches only
7.6. IF CLUTCH DOES NOT HAVE A DATE CODE, OR CODE FORMAT IS DIFFERENT FROM
BELOW, DO NOT REPLACE THE COIL.

WB15-48
Page 8 / 19

8. Remove the existing shaft seal drain tube
and support.
9. Reinstall on the opposite side as seen on
the image on the right.
Note: Use existing hex socket head bolt and
lock washer. Use blue Loctite 243 on
threads.

10. Install new reinforcement bracket #457675
as shown using previously removed
hardware (bolt (C) and flat washer). DO
NOT tighten at this moment.
Note: Use blue Loctite 243 on threads.

LANG clutches only
10.1. Carry on with the installation of new
reinforcement bracket #457675 as shown.
Use two “cylindrical head” socket cap screws
#5001616 (E).
Tighten to 40 lbf-ft (43 N-m)

Note: Use blue Loctite 243 on threads.

LINNIG clutches only:
10.2. Carry on with the installation of new
reinforcement bracket #457675 as shown.
10.3. Any standard bolt head would interfere
with the coil body, therefore use two button
head cap screws #502949 provided in the kit
(E).
Tighten to 32 lbf-ft (43 N-m)

Note: Use blue Loctite 243 on threads.

WB15-48
Page 9 / 19

11. Tighten bolt in location (C).
C= 74 lbf-ft (100 N-m)
Note: If bolts C & E are difficult to drive in hole,
the compressor may be moved slightly to allow
assembly. Loosen the compressor mounting
bolts (4x) at the base.
Once installed, tighten compressor mounting
bolts to 74 lbf-ft. (100 N-m)

12. Pre-assemble the pulley
tensioner bracket #457542.

on

the

new

13. Tighten to 74 lbf-ft. (100 N-m) and install
dust cap.

14. Reinstall tensioner, bolt and washer (B) and
bolt and nut (A).
Do not tighten these bolts yet.
Belt tension adjustment will be done later in
this procedure.

WB15-48
Page 10 / 19

15. Apply decal #069356 were indicated on
the image.

16. Install nylon tie mount #509815 where
indicated on the image.

17. Reinstall the electromagnetic clutch coil.
Slip the coil on the retainer on the
compressor flange. Fasten the coil with 4
screws to the compressor. Do not buckle
the cable.
Coil mounting screws (F): 22 lbf-ft (30 Nm). Use blue Loctite 243.
Caution: Pay attention to the precise
seat of the coil. A non-observance may
cause damage to clutch components
during operation.

WB15-48
Page 11 / 19

18. Mount the clutch on the shaft end.
The flange and the shaft end of the
compressor must be free from dirt. Apply
high temperature approved assembly
grease on the shaft end for easy
dismounting
of
the
clutch.
Lang
recommends the use of Molykote G-rapidplus or Molykote P 40.
19. Carefully mount the rotor on the shaft end by
hand.
Never use a hammer for pressing the rotor
on.
To avoid damaging the bore of the rotor, feel
the engagement of the key in the keyway
and slip the rotor on the shaft end of the
compressor till reaching the stop.
The Woodruff key on the shaft end and the
groove in the location hole of the rotor must
be
flush.
20. Fasten the rotor to the shaft end by using
the M12 screw and by holding-up with a
wrench on the rotor.
Rotor mounting screw (G): 60 lbf-ft (81 Nm) Use blue Loctite 243.
21. Turn rotor by hand and pay attention to the
free run and the generation of noises. In
case of grinding or similar noises, dismount
the clutch and check installation.
22. Reinstall the drive belts.
On vehicles equipped with an auxiliary
alternator (i.e. 2 different belts), the belts
tension should be within this range:
A belt strand tension gauge is needed
150-160 lbs new belts (mean of 2 belt
values)
120-130 lbs used belts (mean of 2 belt
values)
Adjust belt tension using bolt (A). Use the
jam nut to prevent rotation of bolt (A). When
proper tension is achieved, tighten bolt (B)
to 43 lbf-ft. (58 N-m)

WB15-48
Page 12 / 19

UNLOADER COIL REPLACEMENT
A new “clip-on” type unloader coil must be installed
in order to avoid unloader failure.
1. Loosen the screw securing the connector to
the coil and then unplug the connector (A).
Keep the screw and the connector rubber
gasket for later use.
2. Unscrew the aluminum cap and discard.
3. Remove the plastic capture nut and discard.
4. Remove the coil and discard
5. Keep the O-ring on the stem.

6. Install the new clip-on coil on the stem.
7. Slide the coil over the stem assembly with the
O-ring at the base of the stem.

WB15-48
Page 13 / 19

HARNESS #069206 INSTALLATION
Skip the harness installation if a brand new harness has been installed recently while
performing WB14-06.
If you’re not installing a new harness, DO NOT throw it away. Keep it as spare part for
later use if required.
1. While proceeding with one connector at a time,
remove the existing A/C compressor harness
simultaneously as you install the new harness.
The new harness should be installed and
routed like the one being removed.
So9: A/C electromagnetic clutch
Se29: A/C pressure switch
L199: the R.H. side cylinder unloader coil
Se23: high side pressure transducer
Se24: low side pressure transducer
C228: other C228 connector half
Take special care to route the harness according to
the following figures.
Refer to best practices at the end of this document.
Prefer larger, heat resistant cable ties over small
cable ties to limit the “pinch effect”.
Secure the cable on the cable tie mounts where
applicable.
2. Install new harness 069206. Connect L199 to
the unloader coil. Tighten the screw securing
connector L199 to the coil.
3. Secure the cable on the cable tie mounts.

Electromagnetic clutch connector So9. The
clutch should be connected directly (hard
wired) to the harness without using So9.
4. Write down wire color matching then cut the
clutch connectors So9 on harness and
compressor.
5. Slip shrink tube #062490 over each wire. Slip

WB15-48
Page 14 / 19

an additional shrink tube over cable insulation.
6. Refer to table below if required to match wire
colours. (According to VIN of vehicle).

7. According to table, splice wires with butt slice
#562228. Crimp and solder. Inspect to make
sure you have a good crimp and solder.
8. Seal each wire with shrink tube. Seal over the
two wires and cable isolation with shrink tube.
9. Attach clutch cable along bracket as shown.

ATTACH THE EXCESS LENGTH OF CABLE ALONG MAIN STRAND OF HARNESS AS SHOWN– NYLON TIES LOCATION
SHOWN BY ARROWS

WB15-48
Page 15 / 19

ATTACH THE EXCESS LENGTH OF CABLE ALONG MAIN STRAND OF HARNESS AS SHOWN– NYLON TIES LOCATION
SHOWN BY ARROWS

SENSOR IDENTIFICATION

WB15-48
Page 16 / 19

ATTACH THE EXCESS LENGTH OF CABLE ALONG MAIN STRAND OF HARNESS AS SHOWN– NYLON TIES LOCATION
SHOWN BY ARROWS

WB15-48
Page 17 / 19

BEST PRACTICES FOR CABLE SECUREMENT AND ROUTING
(Source: engineering Spec 20.0)
•

Prefer larger cable ties over smaller cable ties in
your assembly to limit local pinch effect.

•

Avoid sharp edges to prevent chaffing and
abrasion.

•

Always attach over harness loom or corrugated
tubes, not on the bare cables themselves.

• No over-tightening of cable ties. (Must only prevent harness movement)

• Perform
smart
harness
routing
to prevent water intrusion in the connectors.
(nearest low point: below connector)

• Also avoid sharp edges of plastic corrugated
tubes.

• No pulling or tension on connections.

• Avoid sharp radius routing paths. (routing path
inside diameter = 2 X cable diameter)

WB15-48
Page 18 / 19

LINNIG ELECTROMAGNETIC CLUTCH INSTALLATION/REMOVAL

WB15-48
Page 19 / 19

PARTS / WASTE DISPOSAL
DO NOT RETURN THE REPLACED PARTS. Discard waste according to applicable environmental
regulations (Municipal/State[Prov.]/ Federal)

WARRANTY
This modification is covered by Prevost’s normal warranty. We will reimburse you the parts and 2 hours
(2.0) of labor upon receipt of a warranty claim. Please submit claim via our Online Warranty System,
available at www.prevostcar.com (under Service \ Warranty section). Use Claim Type: “Bulletin/Recall”
and select ‘’Warranty Bulletin WB15-48".

OTHER
VBC
Bulletin

N/A

Access all our Service Bulletins on

https://secureus5.volvo.com/technicalpublications/en/pub.asp

Fail Code

22.00

Defect
Code

09

Syst. Cond

B

Causal Part

950002

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