Allison B 400 - Lockup Operation Maximum Cooler Flow; Lockup Operation Maximum Allowable Pressure Drop

WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
6–44 Copyright © 1998 General Motors Corp.
DIAGNOSTIC CODES
CONVERTER OPERATION
MAXIMUM COOLER FLOW
Input
rpm
Flow Pressure Drop
L/s gpm kPa psi
600 0.10 1.6 0 0
800 0.23 3.7 0 0
1200 0.47 7.4 0 0
1400 0.61 9.7 0 0
1600 0.74 11.7 0 0
2000 0.94 14.9 0 0
2400 1.19 18.9 0 0
3200 1.28 20.3 0 0
CONVERTER OPERATION
MAXIMUM ALLOWABLE
PRESSURE DROP
Input
rpm
Flow Pressure Drop
L/s gpm kPa psi
600 0.10 1.6 10 1.5
800 0.22 3.5 40 5.8
1200 0.45 7.1 159 23.1
1400 0.57 9.0 252 36.6
1600 0.67 10.6 338 49.0
2000 0.80 12.7 481 69.8
2400 0.85 13.5 549 79.6
3200 0.85 13.5 549 79.6
LOCKUP OPERATION
MAXIMUM COOLER FLOW
Input
rpm
Flow Pressure Drop
L/s gpm kPa psi
600 0.10 1.6 0 0
800 0.23 3.7 0 0
1200 0.50 7.9 0 0
1400 0.63 10.0 0 0
1600 0.77 12.2 0 0
2000 0.95 15.1 0 0
2400 1.12 17.8 0 0
2800 1.22 19.3 0 0
3200 1.28 20.3 0 0
LOCKUP OPERATION
MAXIMUM ALLOWABLE
PRESSURE DROP
Input
rpm
Flow Pressure Drop
L/s gpm kPa psi
600 0.10 1.6 5 0.7
800 0.23 3.7 46 6.7
1200 0.48 7.6 148 21.5
1400 0.62 9.8 247 35.8
1600 0.73 11.6 346 50.2
2000 0.90 14.3 561 81.4
2400 1.07 17.0 737 106.9
2800 1.10 17.4 770 111.7
3200 1.10 17.4 791 114.7
Table 6–6. External Hydraulic Circuit Characteristics
Non-Retarder, PTO, 93°C (200°F) Sump Temperature
MD/B 300/B 400
CODE 24 XX — SUMP FLUID TEMPERATURE (Figures 6–10, 6–11)