SPRING-COIL 4646167 - Caterpillar

Table 1
Lift Cylinder Drift    
Oil Temperature     28 to 48°C (80 to 120°F)     49 to 68°C (120 to 155°F)     69 to 88°C (155 to 190°F)    
Maximum Allowable Drift    
32 mm (1.3 inch)    
32 mm (1.3 inch)    
32 mm (1.3 inch)    
Time Interval (minutes)     5.0     2.75     1.75    Drift Test for Tilt Cylinder
Measure tilt cylinder rod drift by using the following procedure:
Check hydraulic oil temperature.
Fully retract the tilt cylinder.
Lower the bulldozer in order to lift the front idlers off the ground. Move the control levers to the HOLD position and stop the engine.
Obtain a measurement of the distance of cylinder drift over time. Compare the values to the values in the chart.Note: The drift distances in the chart are for new machines.Note: Take a measurement from the blade to the ground for this chart.
Table 2
Tilt Cylinder Drift    
Oil Temperature     28 to 48°C (80 to 120°F)     49 to 68°C (120 to 155°F)     69 to 88°C (155 to 190°F)    
Maximum Allowable Drift    
13 mm (0.5 inch)    
13 mm (0.5 inch)    
13 mm (0.5 inch)    
Time Interval (minutes)     5.0     2.75     1.75    Drift Test for Ripper Cylinder
Measure ripper cylinder rod drift by using the following procedure:
Check hydraulic oil temperature.
Lift the ripper so that the ripper teeth are approximately 254 mm (10.0 inch) off the ground. Move the ripper control lever to the HOLD position. Stop the engine.
Obtain a measurement of the distance of cylinder drift over time. Compare the values to the values in the chart.Note: The drift distances in the chart are for new machines.Note: Take a measurement from the blade to the ground for this chart.
Table 3
Ripper Cylinder Drift    
Oil Temperature     28 to 48°C (80 to 120°F)     49 to 68°C (120 to 155°F)     69 to 88°C (155 to 190°F)    
Maximum Allowable Drift    
25 mm (1.0 inch)    
25 mm (1.0 inch)    
25 mm (1.0 inch)    
Time Interval (minutes)     5.0     2.75     1.75    Speed Tests for Cylinders
The oil in the system must be the oil which is recommended in Operation and Maintenance Manual, and at a temperature of 55° 10°C (131° 18°F). All speed tests should be done with the engine throttle knob at the HIGHEST position.Identify the speed of each cylinder. Compare these values to the values in the chart. Equal values indicate normal circuit operation.If the speed of a cylinder is too slow, check that circuit for cylinder drift.
Table 4
   Speed Test of the Bulldozer Lift Cylinders    Speed (seconds)    
VPAT Bulldozer     RAISE (ground level to maximum height)     2.0 0.2    
VPAT Bulldozer     LOWER powerdown (maximum height to ground level)     1.2 0.2    
VPAT Bulldozer     LOWER float (maximum height to ground level)     1.1 0.2    
Table 5
   Speed Test of the Bulldozer Tilt Cylinder(s)    Speed (seconds)    
VPAT Bulldozer     TILT (full