We reserve the right to make changes in design or add improvements without incur-
ring the obligation to make such changes in equipment previously manufactured.

PARTS-SERVICE

GRAM

SUBJECT: MOTOR-HAND PUMP DRIVE PIN AND CROSSOVER VALVE PRESSURE

RELIEF SETTING

The worm gear fitted to the armature shaft of the motor-hand pump (P/N 286483) is driven by a
pin pressed into a blind hole drilled in the shaft. In the event of this pin failing, the follow-
ing repair procedure is to be carried out.

The blind hole on the armature shaft is to be drilled completely through (see Figure 1 attached),
and the new pin (P/N 2008187) is to be fitted to the shaft and secured in the hole with HCE-
106, P/N 340419 (e.g. Loctite R/C 680).

In conjunction with the fitting of the locking pin, the pressure relief setting on the crossover relief
valve (P/N 813112) should be verified as being 1450±50 psi, as shown in Figure 2 attached.

INTERCHANGEABILITY:

The new pin is directly interchangeable with the old, once the hole has been drilled fully through.

PARTS STOCK:

Not applicable.

EFFECTIVE SERIAL NUMBER:

B176K-1560G

G-B-5

Date: April 20, 1987

Model: R40DH

Steering

G-B-5
April 20, 1987
Page 2

FIGURE 1: Pin Installation

— REMOVE CAPSCREWS, END COVER AND GASKET FROM GEARBOX ( ITEMS 10,11 , 12 )
— REMOVE NYLOCK NUT ( ITEM 14) AND CAPSCREWS ( ITEM 15)
— REMOVE SCREWS AND BRUSH HOUSING TAKING CARE NOT TO PULL THE WIRES (ITEMS 16,17 )

THE ARMATURE AND GEARBOX WILL NOW SLIDE OUT

— SEPARATE THE ARMATURE AND GEARBOX BY REMOVING CAPSCREWS ( ITEM 18) THE WORM WILL DROP

OFF THE SHAF T ( ITEM 19 )

— REMOVE THE PIN FROM THE ARMATURE SHAFT ( ITEM 20 ) AND DRILL THE HOLE

∅

1.55-1.65 (SEE DETAIL

A)

— THOROUGHLY DEGREASE PIN ( ITEM 1 ) AND SHAFT IN AREA OF HOLE USING A PROPRIETARY DEGREASER
— USE HCE-106 ADHESIVE TO SECURE PIN TO SHAFT
— REASSEMBLY IS THE REVERSE OF THE REMOVAL PROCEDURE. TAKE PARTICULAR CARE IN SETTING THE

BRUSHES ON THE COMMUTATOR AND IN PASSING THE ARMATURE AND PIN THROUGH THE GEARBOX

GREASE SEAL

ITEM

QTY

PART NO

DESCRIPTION

1

1

2008187

SPIROL PIN

2

A/R

340419

H C E-106 ADHESIVE

GEARMOTOR — 24 V REF PIN 286483

WHEN GEARMOTOR IS ASSEMBLED ADJUST VALVE AS FOLLOWS:
PLACE A PRESSURE GAUGE IN THE CYLINDER LINE MARKED “P”
(GAUGE VALUE 0-170 BAR, 0-2500 psi)
REMOVE THE VALVE CAP (AT BACK OF INSTALLED UNIT) USING A 5/16 INCH ALLEY KEY.
WHILE TURNING THE STEERING WHEEL AND WITH THE WHEELS FULLY LOCKED RIGHT,
READ THE PRESSURE GAUGE.
ADJUST THE PRESSURE RELIEF VALVE USING A SCREWDRIVER UNTIL THE GAUGE READS
90 ± 3.5 BAR (1305 ± 50 psi).
NOTE: WITH THE VALVE CAP REMOVED, THE PRESSURE MAY READ LOW BY 10 BAR.
CONSEQUENTLY WITH THE CAP FITTED, THE PRESSURE SHOULD READ 100 BAR (1450 psi).

G-B-5
April 20, 1987
Page 3

FIGURE 2: Valve Adjustment

CROSSOVER RELIEF VALVE REF P/N 813112