Stihl 140 Operating instructions

1. Foreword 2
1.1 Note on RE 160 K 2
2. Safety regulations 2
3. Technical
specifications 3
3.1 Motor 3
3.2 Pump 3
3.3 Weights and
dimensions 3
3.4 Capacities 3
3.5 Tightening torques 4
4. Summary of
possible faults 5
4.1 High-pressure pump 5
4.2 Electric motor 7
5. Housing 8
5.1 Removing /
fitting the shroud 8
5.2 Removing /
installing the motor /
pump unit 8
5.3 Chassis 9
6. Safety control block 9
6.1 Removing / installing
the safety control block 9
6.2 Removing / installing
the control piston 10
6.3 Setting the pressure
control system 11
6.4 Injector 12
6.5 Non-return valve 12
6.6 Detergent metering
and non-return valve 13
7. High-pressure pump 14
7.1 Screen in intake port
(water inlet) 14
7.2 Removing / installing
delivery valves 14
7.3 Removing / installing
valve block and
intake valves 14
7.4 Removing / installing
pump housing and
pump piston 15
7.5 Disassembly /
assembly of
pump piston 15
7.6 Replacing
high-pressure cups
and oil seals 16
7.7 Replacing thrust
bearings 17
8. Electric motor 18
8.1 Removal 18
8.2 Installation 21
9. Electrical system 23
9.1 Circuit diagram 23
9.2 Removing / installing
electrical components 24
9.2.1 Switch housing 24
9.2.2 Switch 25
9.2.3 Power cable 25
9.2.4 Capacitor 26
9.2.5 Microswitch 27
10. Spray attachment 27
10.1 Spray gun 28
10.2 Spray lance,
spray head 28
11. Oil change 30
12. Special tools and
service tools 31
12.1 Special tools 31
12.2 Service tools 31
© 2000, Andreas Stihl AG & Co., Waiblingen
RE 140 K, 160 K
CONTENTS
RE 140 K, 160 K 1

This Repair Manual contains a
detailed description of the
fundamental repair work on STIHL
high-pressure cleaners of series
STIHL RE 140 K, 160 K.
A test bed with the necessary
water and power supplies should
be provided for the repair work.
The unit must be connected to the
pressurized water supply and the
fault described by the customer
reproduced, with the customer
demonstrating the fault if
necessary. The customer’s
attention must be drawn to the
User Manual if the machine is
operated incorrectly.
Faults may be due to several
causes. The "Summary of
possible faults" should therefore
be consulted see 4.
The illustrated spare parts lists
must also be used for all repair
work. These lists show the
installation position and order in
which the individual assemblies
should be assembled. Microfilms
are more up-to-date than printed
spare parts lists.
Note the "Technical Information"
bulletins! They contain
information on technical changes
implemented after publication
of this Repair Manual. The
Technical Information bulletins
also supplement the spare parts
list until a new edition is printed!
Repair Manuals and Technical
Information bulletins should
always be kept on hand wherever
repairs are carried out.
They must not be passed on to
third parties.
Only original STIHL spare parts
maybeused!
Please refer to the preceding
Repair Manual for the RE 160 K if
the procedures described and
illustrated in this Repair Manual do
not correspond with your machine.
High-pressure cleaners may only
be repaired by qualified
electricians (in accordance with
DIN VDE 0701 and accident
prevention regulations VBG 4 in
Germany) with due regard for
national safety regulations and the
provisions of the User Manual.
1. FOREWORD 2. Safety regulations1.1 Note on RE 160 K
2RE 140 K, 160 K

RE 140 K RE 160 K
3.1 Motor
Voltage: 230 V / 240 V *) 230 V / 240 V *)
Frequency: 50 Hz / 60 Hz *) 50 Hz / 60 Hz *)
Power output: 2.3 - 2.9 kW *) 2.2 - 3.3 kW *)
Fuse: 16A**) 16A**)
Protection class: I I
Type of protection: IP X5 IP X5
3.2 Pump
Max. working pressure: 140 bar 150 bar
Permissible excess pressure: 150 bar 160 bar
Flow rate: 500 l/h 500 - 550 l/h *)
Suctionlift: 0.5m 0.5m
Max. water feed temperature:
- Pressurized water supply: 50 °C 50 °C
- In suction operation: 40 °C 40 °C
3.3 Weights and dimensions
Length approx.: 370 mm 370 mm
Width approx.: 270 mm 270 mm
Height approx.: 860 mm 860 mm
Weight approx.: 20.0 kg 25.0 kg
3.4 Capacities
High-pressure pump: 100 ml 100 ml
Oil grade: SAE 15 W 40 SAE 15 W 40
*) Depends on country concerned
**) Australia / New Zealand: 10 A
**) GB / N. Ireland / Malaysia: 13 A
**)
3. TECHNICAL SPECIFICATIONS
RE 140 K, 160 K 3

3.5 Tightening torques
Tightening torque
Assembly Connecting element Thread size Nm Remarks
Safety control block Socket-head screw M5x30 7 1)
to valve block
Valve block to Socket-head screw M6x35 15 1)
pump housing
Pump housing to Socket-head screw M6x30 10 1)
drive housing
Drive housing to Socket-head screw M5x25 7 1) 2)
stator housing
Bearing cover and Hex bolt M6x25 7 1) 3)
drive housing to
stator housing
Screw plug, Hexagonal socket-head bolt R1/4" 7 3)
drive housing
Remarks
1) Thread must be clean and dry
2) RE 140 K only
3) RE 160 K only
4RE 140 K, 160 K

Problem Cause Remedy
Pump runs, but does not build Pressure control sleeve not Set required working pressure
up the specified pressure set correctly
Nozzle in spray head worn Replace nozzle
Air in system Vent system; briefly operate
machine without
high-pressure hose
Leak in high-pressure system Seal high-pressure system
Pressure fluctuates or drops Shortage of water Turn on water tap, keep within
maximum suction head
(max. 0.5 m)
Water feed hose too long or Use specified water
cross-section too small feed hose
Water filter clogged Clean water filter in pick-up
body and pump inlet
Pump draws air Check intake line for leaks and
replace if necessary
High-pressure cups worn Replace high-pressure cups
Pump does not run smoothly Water feed temperature is Reduce water feed temperature
too high (see technical specifications)
Intake line is damaged, Replace intake line
pump draws air
Intake / delivery valves of Clean or replace valves
high-pressure pump
soiled or worn
Safety control block cycles after Leak in high-pressure system so Seal, clean and grease the
switching off the spray gun that safety control block does not safety control block
(constant audible switching sound), switch over correctly and the
pump becomes hot bypass does not open completely
Oil contains water High-pressure cups worn Replace high-pressure cups
Oil leak Gaskets in high-pressure pump Replace gaskets
worn
4. SUMMARY OF POSSIBLE FAULTS
4.1 High-pressure pump
RE 140 K, 160 K 5

Problem Cause Remedy
No supply of detergents Detergent tank is empty Fill detergent tank
Detergent metering valve Set required detergent quantity
is closed on metering valve
Pressure control sleeve Set pressure control sleeve
not set to "CHEM." to "CHEM."
High-pressure hose coupling Tighten screw coupling
is not screwed tight
Detergent intake hose clogged Clean
Injector clogged Clean
Gasket on high-pressure hose Replace or fit gasket
connection defective or missing
Weak, ragged, High-pressure nozzle in Clean high-pressure nozzle
unclean jet spray head is soiled or worn with nozzle-cleaning needle
or replace if necessary
6RE 140 K, 160 K

Problem Cause Remedy
Motor hums but does not run Mains voltage too low Check electrical connection
when switched on Spray gun closed Actuate spray gun
Pump stiff Turn motor by hand as described
(blocked or frozen) for "Starting up after prolonged
storage" (User Manual)
Extension lead with wrong Use correct cable cross-section
cross-section (see User Manual)
Motor does not start Connector has not been plugged Check plug, cable and switch
when switched on in correctly, break in power supply
Mains fuse has been tripped Refit mains fuse
Motor stops Overload protection (in winding) Check that supply voltage matches
tripped because motor specified machine voltage.
overheating or overloaded Switch off machine and allow
to cool for at least 3 minutes.
Spray head soiled Clean nozzle in spray head
Note: A correct power supply is essential if the machines are to operate faultlessly. The voltage drop in the
motor during operation must not be excessive, otherwise the motor will turn too slowly and take up too much
power. This causes the windings to heat up and the overload switch cuts out the machine after only a short
period of operation. Moreover, the machine cannot build up the rated power output and problems may arise
during the starting phase, i.e. between switching on the motor and reaching the nominal speed.
4.2 Electric motor
RE 140 K, 160 K 7

•Unscrew high-pressure hose (1).
•Unscrew hose connector (2)
from water inlet.
•Undo fastening screws (rear
screw not shown).
•Remove shroud.
Ensure that spring nuts and
power cable are not lost.
Reassemble parts in reverse order.
•Disconnect detergent intake
hose from metering valve.
-Remove shroud (see 5.1).
- Stand machine upright.
RE 140 K
•Undo fastening screw on motor /
pump unit, steadying the
machine with the other hand at
thesametime.
•Lift motor / pump unit out of
frame.
RE 160 K
•Undo fastening nuts on motor /
pump unit, steadying the bolts at
the same time if necessary.
Hold the machine steady and
ensure that washers are not lost.
- Lay machine in a horizontal
position.
•Lift motor / pump unit out of
frame. Ensure that rubber
buffers, screws and washers
are not lost.
All models
Reassemble parts in reverse order.
621RA001 BL
12
621RA002 BL
621RA084 KN
621RA087 KN
621RA085 KN
621RA086 KN
5. HOUSING
5.1 Removing / fitting the 5.2 Removing / installing motor / pump unit
621RA005 BL
8RE 140 K, 160 K

•Remove handle:
•Undo fastening screws with
size 5 hexagon socket wrench.
- Remove handle and replace if
necessary.
Remove retainer and shaft:
•Undo fastening screws with
size 5 hexagon socket wrench.
- Remove retainer and shaft.
Proceed as described for the
high-pressure cleaners of series
STIHL RE 310 K, 340 K and 440 K
for changing wheels.
Replace faulty parts.
Reassemble parts in reverse order.
Important: The O-rings must
always be replaced when carrying
out repair work.
Before assembling the parts, all
moving parts, sealing rings and
screw threads must be thinly
coated with special grease
for high-pressure cleaners
0781 145 3516. Exceptions to
this rule are mentioned where
appropriate.
Note: The permissible working
pressure of the machine has been
set on the safety control block by
the manufacturer and must not be
changed. A lead seal is fitted to
the safety control block for this
reason.
The permissible working pressure
must be reset after all repairs and
a new lead seal fitted to the safety
control block.
-Remove shroud (see 5.1) and
motor /pump unit (see 5.2).
Note: The screw plug should only
be removed if leaking.
•Undo fastening screws.
•Carefully remove the safety
control block. Ensure that the
adjusting screw for the micro-
switch, O-rings and delivery
valves are not lost.
•Replace O-rings.
621RA007 BL
621RA008 BL
5.3 Chassis 6. SAFETY CONTROL
BLOCK 6.1 Removing / installing thesafetycontrolblock
621RA009 BL
621RA010 BL
RE 140 K, 160 K 9

To replace the safety control block
housing:
Remove
-controlpiston(see6.2),
-injector (see 6.4),
-non-returnvalve(see 6.5) and
- detergent metering valve
(see 6.6).
Reassemble parts in reverse order
and ensure that O-rings are fitted.
•Carefully insert adjusting
screw (1) into opening (2) in
microswitch.
- Turn in fastening screws and
tighten down crosswise with a
torque of 7 Nm.
- Then set the working and cutout
pressure(see 6.3) and refitthe
lead seal on the safety control
block.
-Remove shroud (see 5.1).
•Carefully prise off U-bar (1) with
a screwdriver if necessary and
pull it out.
•Draw control piston (2) out of
safety control block housing.
•O-rings (1, 2) on control piston
must always be replaced.
- Examine control piston for signs
of damage and replace
completely if necessary. Ensure
that correct control piston is fitted
(spare parts list).
•Draw valve body out of
safety control block with hook
5910 890 2900. Remove ball
and valve-seat insert from safety
control block.
•Replace O-ring (1) in valve body.
- Examine valve body, ball and
valve-seat insert; replace if ne-
cessary.
- Clean valve seat in safety control
block.
Reassemble parts in reverse order.
Note: Thinly coat valve-seat
insert, valve body and O-ring with
special grease for high-pressure
cleaners 0781 145 3516 before
fitting them.
- Fit control piston and secure with
U-bar.
•Then set pressure control
system (see 6.3).
6.2 Removing / installing the
control piston
621RA013 BL
1
2
621RA014 BL
12
10 RE 140 K, 160 K

- Connect test pressure gauge
5910 850 3205 between high-
pressure port and high-pressure
hose.
- Connect water inlet and high-
pressure hose.
•Completely unscrew the micro-
switch adjusting screw (1) with a
size 2.5 hexagon socket wrench.
- Switch on machine.
- Open spray gun.
- Set maximum working pressure
on spray lance.
•Back off adjusting nut (2)
until pressure has dropped
completely.
•Screw adjusting nut in again until
reading on pressure gauge no
longer increases (maximum
working pressure).
- The setting is adjusted precisely
by slowly backing off and scre-
wing in the adjusting nut.
The bypass valve is set correctly
when the adjusting nut is screwed
in precisely to the point necessary
for the maximum pressure
(reading on pressure gauge) to be
barely reached.
- Let machine run for approx.
10 seconds. Operate the spray
gun two or three times.
Note: The maximum pressure
and cutout pressure settings are
determined by the adjusting nut.
Ensure that the cutout pressure
does not become too high by scre-
wing the nut in further.
The cutout pressure (= pressure
at which the bypass valve opens)
must be 5 bar higher than the
maximum working pressure
(see 3.2).
To check the setting:
- Close spray gun and read off
cutout pressure value on
pressure gauge.
If the value is too high:
- Open spray gun.
- Back off adjusting nut slightly.
- Close spray gun.
- Check cutout pressure.
Repeat this procedure until the
specified cutout pressure (see
above) has been reached. The
working pressure must not
decrease at the same time
(reading on pressure gauge when
spray gun is open).
The cutout pressure must also
remain constant. If necessary, the
setting must be repeated or the
high-pressure cleaner examined
for leaks.
The microswitch is set with the aid
of the adjusting screw when the
motor is running and with the
spray gun closed:
- Turn adjusting screw in until
motor cuts out.
- Then turn on another half-turn.
- Check setting at minimum
pressure and correct if necessa-
ry.
- Actuate spray gun several times.
The motor must switch on when
the spray gun is opened and
off when it closes; repeat
adjustment if necessary.
- Seal setting of locknut and
adjusting screw with locking
paint.
- Remove test pressure gauge.
6.3 Set pressure
control system
621RA076 BL
1
2
RE 140 K, 160 K 11

- Unscrew high-pressure hose,
remove shroud if necessary
(see 5.1).
•Unscrew high-pressure hose
connection with size 30 fork
wrench.
- Replace O-ring in high-pressure
port.
•Pull injector out of safety
control block housing with hook
5910 890 2900.
Engage hook in two holes in
injector housing.
•Drive injector nozzle (1) out of
injector housing with a pin
(dia. 2 mm).
•Replace O-rings in injector.
- Examine injector nozzle and
housing; replace if necessary.
- Clean valve seat in safety control
block housing.
Reassemble parts in reverse order.
- Thoroughly grease injector and
O-rings before refitting them
(special grease 0781 145 3516).
- Screw high-pressure hose
connection in as far as possible
with new sealing ring.
- Remove safety control block
(see 6.1).
-Remove injector (see 6.4).
•Pull spring (1) and piston (2) out
of safety control block housing
(use pliers if necessary).
•Replace O-ring (3) on piston.
- Clean valve seat in safety control
block housing.
Reassemble parts in reverse order.
- Insert piston in housing with
O-ring facing inwards.
- Ensure that piston and spring
are seated correctly.
Refit injector and safety control
block.
621RA012 BL
621RA017 BL
1
621RA022 BL
1
2
3
6.4 Injector 6.5 Non-return valve
12 RE 140 K, 160 K

Note: The detergent intake
comprises a detergent metering
valve, a detergent non-return
valve and an injector nozzle in the
high-pressure port.
The injector must also be
examined (see 6.4) iffaults arise
in the detergent intake.
•Disconnect detergent intake
hose from metering valve.
•Pull split pin (1) out of adjusting
knob (2).
•Remove adjusting knob (2).
•Unscrew banjo bolt from safety
control block. Ensure that the
spring and ball of the non-return
valve are not lost in the process.
•Remove O-ring (1) from banjo
bolt.
- Pull banjo bolt out of metering
valve.
- Clean and examine all parts,
replace if necessary.
- Clean valve seat in safety control
block.
Reassemble parts in reverse order.
- Fit valve ball in banjo bolt.
•Fit valve spring with narrow end
facing ball.
- Align metering valve so that
intake connector points back to
intake hose.
- Screw banjo bolt into safety
control block and tighten
securely.
6.6 Detergent metering and
non-return valve
621RA090 KN
1
621RA089 KN
1
2
621RA088 KN
621RA091 KN
621RA084 KN
RE 140 K, 160 K 13

•Unscrew hose connector from
water inlet (see 5.1).
•Remove screen from intake port
with pliers, clean it and replace if
necessary.
Reassemble parts in reverse order.
-Remove shroud (see 5.1) and
motor /pump unit (see 5.2).
- Remove safety control block
(see 6.1).
The delivery valves are removed
and installed in the same way as
on the high-pressure cleaners of
series RE 102 K, 104 K and 106 K.
Important: Different valves are
used in the high-pressure cleaners
RE 140 K, 160 K (see spare parts
list).
Note: Where possible, defective
valves should only be replaced as
a complete unit (O-ring (1), valve
head (2), plate (3), spring (4) and
cage (5)). The intake valves
must also be checked(see7.2) if
delivery valves are soiled or
damaged.
- Check correct functioning before
installing valves.
-Remove shroud (see 5.1) and
motor /pump unit (see 5.2).
- Remove safety control block
(see 6.1).
- Remove delivery valves if
necessary(see 7.2).
•Undo fastening screws (1).
•Remove retaining plate (2) with
microswitch.
The intake valves are removed
and installed in the same way as
on the high-pressure cleaners of
series RE 102 K, 104 K and 106 K.
Important: Different valves are
used in the high-pressure cleaners
RE 140 K, 160 K (see spare parts
list).
- Pull valve discs out of valve
block.
621RA026 BL
621RA023 BL
12
34
5
621RA025 BL
11
11
2
1
7. HIGH-PRESSURPUMP
7.1 Screen in intake port
(water inlet)
7.2 Removing / installing
delivery valves 7.3 Removing / installing valve block and intake valves
14 RE 140 K, 160 K

Note: Where possible, defective
valves should only be replaced as
a complete unit (O-ring (1), valve
head (2), plate (3), spring (4) and
cage (5)). The intake valves and
delivery valves are identical.
Brass valve block only:
•Fit valve discs (6).
- Check correct functioning before
installing valves.
Reassemble parts in reverse order.
Ensure that all O-rings are fitted
and that the valve block is not mi-
saligned when fitted.
- Turn in fastening screws.
- Insert microswitch and turn in
fastening screws.
- Tighten fastening screws on
valve block down crosswise
(15 Nm).
-Remove valveblock(7.3).
-Drainoil (see chapter 11).
The pump housing and pump
piston are removed and installed
in the same way as on the high-
pressure cleaners of series
RE 102 K, 104 K and 106 K.
Note: Steady the pump housing
when undoing the fastening
screws so that it is not pushed
aside by the force of the springs.
-Remove pump piston (see 7.4).
- Remove spring and washer.
- Remove circlip.
•Examine piston (1), spring (2),
washer (3) and circlip (4) and
replace if necessary.
Reassemble parts in reverse
order. Ensure that washer is fitted
correctly.
621RA024 BL
1234
56
621RA042 BL
1
2
34
7.4 Removing / installing
pump housing and
pump piston
7.5 Disassembly / assembly
of the pump piston
RE 140 K, 160 K 15

-Remove pump piston (see 7.4).
The high-pressure cups and oil
seals are removed and installed in
the same way as on the high-
pressure cleaners of series
RE 102 K, 104 K and 106 K, with
the following additional steps:
•The oil seals (1) in the pump
housing are mounted on support
rings (2).
•The oil seals can be prised
out by applying an implement in
the recesses (3) in the pump
housing.
RE 160 K
•The high-pressure cups (1) in
the valve block are likewise
mounted on a support ring (2).
RE 140 K
RE 160 K
Installation position of the oil seals
and high-pressure cups:
1 High-pressure cup
2 Support ring
3 Valve block
4 Oil seal
5 Support ring
6 Pump housing
7 Guide bushing
All models
Note: Use assembly device
4726 890 2200 (assembly arbor
and sleeve) to fit the high-pressure
cups and oil seals.
Proceed as follows:
•Coat inner surface of assembly
sleeve 4726 890 2200 with
special grease.
•Fill the grooves of the high-
pressure cups and oil seals with
special grease 0781 145 3516.
•Coat the new high-pressure
cup (1) with special grease
0781 145 3516 and press onto
assembly arbor 4726 890 2200
together with support ring (2).
7.6 Replacing the high-pressure
cups and oil seals
621RA043 BL
1
2
3
7
4
1
5
621RA045 BL
3 3
6
6
2
621RA079 BL
6
21RA078 BL
6
21RA044 BL
1
2
6
21RA080 BL
1
2
5
33
621RA092 KN
1
2
4
5
6
16 RE 140 K, 160 K

•Slide assembly arbor with
high-pressure cup into the larger
opening in the assembly sleeve
(interior of sleeve is tapered).
- Press sleeve against a soft, level
and clean surface and adjust
arbor until cup is flush with end
of sleeve.
- Position complete assembly
device on valve block. The
collar fits into the seat of the
high-pressure cup.
•Drive high-pressure cup into seat
in valve block with the assembly
arbor.
- Fill grooves of oil seals with spe-
cial grease 0781 145 3516.
•Slide oil seal onto assembly
arbor with the groove facing
upwards. The sealing lip of the
oil seal fits into the recess on the
assembly arbor.
- Press oil seal into pump
housing with assembly tool
4726 890 2200 in the same
way as the high-pressure cups.
Do not damage the sealing lip.
- Insert support rings in pump
housing and press in with
assembly arbor.
Reassemble remaining parts in
reverse order.
- Installation position of guide
bushing: see diagram.
-Remove shroud (see 5.1) and
motor /pump unit (see 5.2).
- Remove safety control block
(see 6.1),valve block (see 7.3)
and pump housing (see 7.4).
The outer thrust bearing is
removed and installed in the same
way as on the high-pressure
cleaners of series RE 102 K,
104 K and 106 K.
RE 160 K only
•Pull swashplate (1) and inner
thrust bearing off the drive shaft.
Examine the various parts of the
outer (see RE 102/104/106 K) and
inner thrust bearing and replace if
necessary: upper washer (1), cage
with bearing rollers (2) and bottom
washer (3).
7.7 Replacing thrust bearings
6
21RA082 BL
621RA046 BL
1
621RA083 BL
621RA047 BL
1
2
3
6
21RA081 BL
RE 140 K, 160 K 17

All models
Reassemble parts in reverse order.
Note: All parts of the thrust bea-
ring and the swashplate must be
well oiled before being installed.
-Remove shroud (see 5.1).
- Remove switch housing
(see 9.2.1) and microswitch
(see 9.2.5).
RE 160 K only
-Remove power cable(see 9.2.3)
and capacitor (see 9.2.4).
All models
-Drainoil (see chapter 11).
-Remove valveblock(see 7.3)
and pump housing (see 7.4).
RE 140 K
•Undo fastening screws in cover.
- Remove cover and fan shroud.
Note: The fastening screw is se-
cured with Loctite.
•Block the fanwheel with a screw-
driver (1), but without damaging it.
•Undo fastening screw (2).
- Examine fanwheel and replace if
necessary.
•Undo fastening screws on drive
housing.
•Carefully prise drive housing off
stator housing with two screw-
drivers:
- alternately, working crosswise,
- in small steps.
Do not damage the housing.
•Draw drive housing off stator
with rotor.
8. ELECTRIC MOTOR
8.1 Removal
621RA093 KN
621RA094 KN
1
2
621RA095 KN
621RA096 KN
621RA097 KN
18 RE 140 K, 160 K

•Press rotor out of drive housing
and swashplate with suitable
arbor.
•Remove swashplate (1) from
drive housing.
Remove shoulder bearing:
•Remove screw plug (2) and
plug (3).
- Uniformly heat drive housing to
approx. 80 °C on a hotplate or
with a hot-air fan; the shoulder
bearing will then drop out of the
housing.
Important! Wear gloves!
- Press oil seal down and out of
drive housing with a screwdriver.
•Press ball bearing out of stator
with suitable arbor.
Important! Oil seals, shoulder
bearings and ball bearings which
have been removed must always
be replaced by new parts.
RE 160 K
•Undo fastening screws for fan
shroud.
- Remove fan shroud.
•Remove clamping ring (1) with
standard extractor.
- Remove fanwheel, carefully pri-
sing it off with a screwdriver if ne-
cessary.
- Examine fanwheel and replace if
necessary.
•Undo fastening screws in
bearing cover.
•Carefully prise bearing cover off
stator with two screwdrivers.
Do not damage stator housing or
bearing cover.
Remove bearing cover.
621RA098 KN
621RA099 KN
1
2
3
621RA100 KN
621RA048 BL
621RA049 BL
1
621RA051 BL 621RA050 BL
RE 140 K, 160 K 19

•Remove feather key (1) from
drive shaft.
- Mark installation position of drive
housing on stator.
•Undo fastening screws on
drive housing. Ensure that the
fastening clamp for the capacitor
is not lost.
•Carefully draw drive housing
out of stator with rotor. Do not
damage housing.
•Examine ball bearing (1) in
bearing cover and replace if ne-
cessary.
•Draw ball bearing off drive shaft
in order to replace it.
•Press rotor out of drive shaft with
suitable arbor.
- Examine ball bearing of drive
housing and remove as
described above if necessary.
•Press oil seal down and out of
drive housing with a screwdriver.
- Unscrew valve.
Important: Oil seals and ball
bearings which have been
removed must always be replaced
by new parts.
621RA052 BL
1
621RA053 BL
621RA055 BL
1
621RA056 BL
621RA054 BL
621RA057 BL
20 RE 140 K, 160 K