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BMW Motorcycle (R1100RT, R1100RS, R850/1100GS, R850/1100R). Manual - part 20

12.9

Adjusting procedure for Poly-V belt:
Poly-V belt installation procedure:

•

Place the Poly-V belt in position, tension it, turn
the engine over once, then relieve belt tension

Poly-V belt tensioning procedure:

•

Loosen alternator mount (1, 2, 3).

•

Screw up hex nut (1) at adjusting screw (4) lightly
by hand (using no tools)

•

Tighten adjusting screw (4) using torque wrench;
fully tighten retaining nut (3), slacken off adjusting
screw and tighten down screws.

Note:

Siehe auch Serviceinformation 12 020 95 (700).

Tightening torque:

Poly-V belt preload ......................................... 8 Nm
Alternatorto alternator support cover............ 20 Nm
Positive lead to alternator ............................. 15 Nm
Belt pulley at alternator................................. 50 Nm

RS110480

12.10

Dismantling/reassembling alterna-
tor

•

Take out the cover retaining screws (1).

•

Release clips (2) and remove the cover.

•

Remove voltage regulator (3).

•

Remove the Poly-V belt pulley.

•

Install in the reverse order of work.

Tightening torque:

Belt pulley at alternator................................. 50 Nm

RS120050

12.11

Checking alternator

Note:

Before each

Ω

measurement, calibrate to zero with

the BMW diagnosis tester:
Connect the positive (yellow) and negative (green)
leads together.

Ω

-key is to be pressed until the dig-

ital display reads 0.00

Ω

•

Using BMW Diagnosis tester,
BMW No. 61 1 510, measure resistance between
the sliprings.

Nominal resistance:......................................... 3

Ω

Checking armature for short to ground
(earth)

•

Measure resistance between sliprings and arma-
ture

Measured result:.............................OL = open line

RS120070

RS120060

12.12

Removing and installing starter
motor

•

Remove dualseat.

•

[RS/RT] Remove left side section of fairing.

Caution:

Disconnect ground (earth) lead from battery. Insu-
late ground (earth) lead.

•

[RS/GS/R] Remove cover (1) for starter motor
and pull off wire (2) for power socket.

•

Detach connecting lead (3).

•

Take out retaining screws (4) and remove the
starter motor.

•

Install in the reverse order of work.

Tightening torque:

Starter motor to engine ................................ 20 Nm
Starter motor cover to gearbox housing ......... 7 Nm
Positive lead to starter motor........................ 10 Nm

RS120140

12.13

Dismantling/reassembling starter
motor

•

Detach lead (1).

•

Remove retaining screws (2).

•

Remove flange (3).

•

Remove solenoid switch (4) after taking out the
retaining screws (5).

•

Remove release lever (6) and spring (7) from so-
lenoid switch (8).

•

Remove retaining ring (9) and take starter motor
gear assembly (10) off shaft.

•

Install in the reverse order of work.

•

Coat the steep-angle thread and the engaging
ring with Bosch PZ 2 V 3 silicone grease.

Renewing carbon brushes

•

Detach lead (1).

•

Remove cover (11).

•

Remove holder (12) for carbon brushes.

•

Lift up retaining springs (13) and remove carbon
brushes (14).

•

Install carbon brushes with retaining plate.

•

Slide short lead (15) on to threaded pin.

•

Install cover (11).

•

Attach lead (1).

Checking starter motor

Engine temperature

20 °C

•

Ammeter in positive lead to starter motor.

Starter is in good working order at:

............................................................app. 80...150 A

•

Voltmeter connected to (+) and (-) on starter mo-
tor

Starter is in good working order at:

.........................................................app. 10...11 V

Checking starter relay

Note:

Before each

Ω

measurement, calibrate to zero with

the BMW diagnosis tester:
Connect the positive (yellow) and negative (green)
leads. Press the

Ω

key until the digital display reads

0.00

Ω

•

After calibation, insert the

Ω

meter between

terminals 30 and 87.

Ω

value ..............................................................0

Ω

•

Connect positive supply to terminal 85 and neg-
ative supply to terminal 86. Then:
Connect (+) to terminal 85, (-) to terminal 86b.

The relay must be energized.

Ω

value: ............................................................ 0

Ω

RS120080

12.14

Removing and installing magnetic
gate

•

Remove dualseat.

•

[RS/GS/RT] Remove side sections of fairing.

•

[RS] Remove inner fairing panel at fuel tank.

•

[R] Remove tank cover.

•

Unscrew fuel tank mount and carefully move the
tank to the rear.

Caution:

Do not scratch paint; place foam rubber mat or
similar item under tank.

Caution:

Disconnect ground (earth) lead from battery.
Insulate the ground (earth) lead!

•

Separate plug connection (1) for magnetic trig-
ger.

•

Remove front cover from engine.

•

Slacken off alternator mount (2) and relieve
tension on Poly-V belt.

•

[RS/GS/R] Remove starter motor cover/pull off
power socket lead.

•

Remove starter motor.

•

Lock clutch housing with retaining device,
BMW No. 11 5 640.

RS120090

RS180050

12.15

•

Remove rotary breather pipe (3).

•

Remove pulley (4).

Note:

Ggf. Einbaulage der Magnetschranke für Wiederein-
bau kennzeichnen.

•

Remove magnetic trigger (5).

•

Install in reverse order of work.

•

[from 1995 model year on] Secure rotor (6) of
Hall-effect gate with Loctite instant adhesive or
similar to the Poly-V belt.

Caution:

Install lock (7) for belt pulley
[from 1995 model year on location at Hall-effect
gate rotor] in groove/crankshaft (7).
Carefully dismantle magnetic trigger lead. Tension
Poly-V belt according to installation procedure.

Tightening torque:

Pre-tension of Poly–V belt .............................. 8 Nm
Alternatorto alternator mount cover .............. 20 Nm
Belt pulley to crankshaft ............................... 50 Nm

Timing the ignition

•

Lock the clutch housing with the TDC insert pin,
BMW No. 11 2 650.

•

Connect ignition tester, BMW No. 12 3 650, and
adapter lead, BMW No. 12 3 652, to Hall-effect
trigger plate.

•

Slacken off plate of Hall-effect trigger.

•

Turn plate until telltale lamp just goes out.

•

Tighten plate on Hall-effect trigger.

•