Testing and Adjusting 784C and 785C Off-Highway Truck/Tractors Power Train

Media Number --07

Publication Date -01/03/2004

Date Updated -08/03/2004

Table 1

Shift Points At Nominal Engine Speed    

Upshift    

Engine Speed    

Transmission Output Speed    

1C to 1L    

1635 ± 50    

366    

1L to 2    

1855 ± 30    

495    

2 to 3    

1855 ± 30    

668    

3 to 4    

1840 ± 30    

905    

4 to 5    

1840 ± 30    

1222    

5 to 6    

1840 ± 30    

1657    

Downshift    

Engine Speed    

Transmission Output Speed    

6 to 5    

1290 ± 30    

1569    

5 to 4    

1290 ± 30    

1162    

4 to 3    

1290 ± 30    

856    

3 to 2    

1290 ± 30    

634    

2 to 1L    

1300 ± 30    

468    

1L to 1C    

1262 ± 30    

336    

Table 2

Maximum Travel Speeds at 1900 rpm (33.00-R51 tires)    

Gear    

Speed    

R    

10.9 km/h (6.8 mph)    

1    

12.1 km/h (7.5 mph)    

2    

16.3 km/h (10.1 mph)    

3    

22.2 km/h (13.8 mph)    

4    

29.9 km/h (18.6 mph)    

5    

40.6 km/h (25.2 mph)    

6    

54.8 km/h (34.0 mph)    

Table 3

Spacer Chart for the Outlet Relief Valve    

Pt. No. for the Spacers    

Thickness of the Spacers    

Change in Pressure as a result of one Spacer    

5M-9624 Spacer    

.25 mm (0.01 inch)    

5 kPa (0.73 psi)    

5M-9623 Spacer    

.90 mm (0.035 inch)    

18 kPa (2.61 psi)    

Table 4

Spacer Chart for the Inlet Relief Valve    

Pt. No. for the Spacers    

Thickness of the Spacers    

Change in Pressure as a result of one Spacer    

5M-9624 Spacer    

.25 mm (0.01 inch)    

14 kPa (2.0 psi)    

5M-9623 Spacer    

.90 mm (0.035 inch)    

49 kPa (7.1 psi)