Skytrak 6036 Service Manual Bedienungsanleitung PDF herunterladen (Seite 255)

Section 10. Electrical System

Model 6036 S/N 9B0499 and Before

10-61

10.13 EMERGENCY BRAKING

AND STEERING SYSTEM

10.13.1 Low Oil Pressure Switch

The emergency pump oil pressure switch (31, Fig.

10.5) performs three functions:

• When starting the engine, the switch

energizes the emergency steer pump to

supply oil pressure as the engine is being

started;

• When oil pressure at the engine rises

above 4 psi (0,3 bar), the switch opens,

stopping the emergency steer pump

because the engine is turning fast enough

for the tandem pump to supply sufficient

hydraulic oil pressure for forklift operation.

• If engine oil pressure again falls below 4

psi (0,3 bar), the switch will close and the

emergency steer pump will resume

operation for as long as the battery retains

a sufficient charge.

6. Coupling

7. Washer

8. Screw

9. Washer

10. Ground Strap

1. Motor

2. Pump

3. Screw

4. Solenoid

5. Terminal Cable

Fig. 10.68 Steering and Emergency Brake Pump and

Motor (S/N 7P0013 and Before)

a. Removal

1. Disconnect negative (–) cable (2, Fig. 10.38)

from the batteries.

2. Unlock and open right engine access door.

3. Tag and disconnect wires from terminals of

emergency pump oil pressure switch.

4. Remove the switch.

b. Disassembly

Do not disassemble the engine emergency pump

oil pressure switch.

c. Cleaning and Drying

Without submerging the switch, clean the switch

as required by using a fiber bristle brush and an

approved solvent.

d. Inspection and Replacement

1. Test the switch for continuity. It should close

when oil pressure falls below 4 psi (0,3 bar). It

should open when oil pressure rises above 4

psi (0,3 bar).

2. Replace the switch if it fails to pass the tests in

step 1.

e. Installation

1. Install the emergency pump oil pressure

switch.

2. Connect the wires to the terminals of the

emergency pump oil pressure switch.

engine, allow engine to idle for several min-

utes, and check for leakage at the heater

connections.

6. Disconnect battery ground cable (2, Fig.

10.38) from the negative terminals of the

batteries.

7. Connect wiring to motor.

8. Prepare to electrically ground the heater unit

by positioning tooth type ground washers (3,

Fig 10.67) over the tapped holes in the coolant

inlet/outlet side of the heater. Use a thin,

transparent tape to temporarily secure the

washers to the heater unit.

9. Slide heater and fan unit (7) into position

under suspension support (12) without disturb-

ing the ground washers (3) which were taped

into position during the previous step.

10. Install two lock washers (5), capscrews (4)

and spacers (6) at the other side of the

suspension support (12).

11. Install two lock washers (2) and capscrews (1)

through the holes in the suspension support

(12) and through the tooth type grounding

washers (3) into the tapped holes in the

heater.

12. Connect negative (–) cable (2, Fig. 10.38) to

the batteries.

13. Test heater fan motor operation.

PA0562

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