797B Off-Highway Truck Fan Drive Hydraulic System: Motor Rotating Group (Fan Drive) - Adjust

Motor Rotating Group (Fan Drive) - Adjust

(A) Dimension of the required gap of 0.3 + 0.1 - 0.0 mm (0.0118 + 0.0039 - 0.0 inch) (1) Piston (2) Center pin (3) Barrel (4) Spring(5) Shim

Note: Dimension (A) is the gap that is required between shim (5) and the end of center pin (2) .
This procedure will determine the thickness of the shim that is needed to obtain a gap of dimension (A) .

1. Remove spring (4) from barrel (3) .

(B) Measured dimension (2) Barrel (3) Center pin (5) Shim (6) Motor shaft (7) Retaining ring(8) Port plate



2. Install the rotating group into the housing. Refer to Illustration 2.

3. Apply 800 N (180 lb) of pulling force to motor shaft (6) in order to seat the rotating group against retaining ring (7) .

4. Position the face of port plate (8) parallel to the face of the motor housing.

5. Measure dimension (B) from the face of port plate (8) to the face of the motor housing.

6. Subtract the gap dimension 0.3 + 0.1 - 0.0 mm (0.0118 + 0.0039 - 0.0 inch) (A) from the measured dimension (B). This is the thickness of shim (5) .Note: Measurement (B) - [0.3 + 0.1 - 0.0 mm (0.0118 + 0.0039 - 0.0 inch)] = Shim Thickness
   Note: Refer to the Specifications, "Motor Rotating Group (Fan Drive)" for the proper shim to use.

7. Remove barrel (2) and install spring (4) and the shim (5) that was determined in Step 6.

Assembly Procedure

Refer to Disassembly and Assembly, "Pump Drive - Assemble" for final adjusting of the pump drive.

Cleaning Procedure

1. Before assembly, ensure that all parts are clean. Also, ensure that all passages are free from debris.

2. After the pump drive is fully assembled, connect the appropriate hardware in order to power the yoke.

3. Use SAE 10W oil at 66 °C (150 °F). The oil must meet a minimum cleanliness of the standard ISO 16/13. Supply the oil at 12 L/min (3.2 US gpm). Rotate the yoke at 2067 RPM for 20 minutes.

4. Check for leaks, abnormal noise, or large debris in the drain port. Take corrective action if any of these problems exist.

5. After this flushing procedure, the oil that is exiting the pump drive must meet a minimum cleanliness of the standard ISO 16/13. If the drain oil does not meet this requirement, repeat Steps 1 through 5 until the oil meets this requirement.

Worksheets

Table 1

Hydraulic Fan Drive Test
Machine Model		Date
Machine Serial Number		Machine Hours
ECM Flash File		Flash File Date

Table 2

Hydraulic Fan Control Temperatures
Temperatures During The Test
Aftercooler	Jacket Water	Transmission Lube	Torque Converter	Brake

Table 3

Hydraulic Fan Speed Override Test
Fan Override Speed	Actual Fan Speed At Low Idle	Pump Pressure At Low Idle	Actual Fan Speed At High Idle	Pump Pressure At High Idle
None
200 rpm
300 rpm
400 rpm
500 rpm
525 rpm
625 rpm
Disconnect The Solenoid.

Table 4

Hydraulic Fan High Pressure Cut Off
Engine Speed at Low Idle	Pump Pressure

Table 5

Hydraulic Fan Control Hoist Lever Operation
Engine Speed	Coolant Temp > 88 °C (190 °F)	TC Temp > 88 °C (190 °F)	Hoist Lever Position	Desired Fan Speed	Actual Fan Speed
High Idle Neutral No Service Brakes	Actual Temp	Actual Temp	Raise or Lower	200 rpm

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797B Off-Highway Truck Fan Drive Hydraulic System: Motor Rotating Group (Fan Drive) - Adjust 2013-01-25T20:11:00-08:00 Rating: 4.5 Diposkan Oleh: Unknown