Deutz 1012 Dokumentacja Pobierz pdf (Strona 171)

Service Training

Page 13

Section 4.5

4.5.7 PRESSURE DIFFERENCE DP

TEST REQUIREMENTS

- Truck blocked up.

- Engine and travel hydraulics at operating temperature.

- Pedal adjustment is in order.

- Symmetry of travel control is in order.

- Two low pressure gauges connected to ports Y and Z of travel control unit with screw couplings 1.1 (refer

to "Aids and Tools for Measurements").

TEST

Test Symptoms Assessment

Start the engine. Dp between ports Y and Z Adjustment of pressure

Release the brake. rises to 11

+0.1

bar. relief valve (34) in order.

Alternately depress forward

and reverse pedal as far as Dp between ports Y and Z Adjustment of pressure

possible. does not rise to 11

+0.1

bar relief valve (34) not in

or is larger. order.

Adjust as follows:

- Slacken locknut (7) at pressure relief valve (34).

- If Dp was too large, turn screw (8) out.

- If Dp was too small, turn screw (8) in.

- Repeat the test.

- Tighten locknut (7).

If an adjustment is not possible, the travel control unit should be repaired or replaced.

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Deutz 1012 Dokumentacja Strona 171