W T E C I I I E L E C T R O N I C C O N T R O L S T R O U B L E S H O O T I N G M A N U A L
0011 00–131
APPENDIX B — CHECKING CLUTCH AND RETARDER PRESSURES
D.
Retarder Pressure Checks — MD/B 300/B 400 And HD/B 500
1. MD 3060/3066, B 300, B 400 Test Conditions:
Second Range Lockup, 100 Percent Retarder Apply, Input Speed = 1075–1125 rpm
2. MD 3560 Test Conditions:
Second Range Lockup, 100 Percent Retarder Apply, Input Speed = 1350–1400 rpm
3. HD 4060/4070/B 500 Test Conditions:
Second Range Lockup, 100 Percent Retarder Apply, Input Speed = 800–850 rpm
4. HD 4560 Test Conditions:
Second Range Lockup, 100 Percent Retarder Apply, Input Speed = 965–1015 rpm
Table B–3. Retarder Specifications At Above Test Conditions
Parameter To Check
High Capacity
Medium Capacity
Low Capacity
Main Pressure–kPa [psi]
1200–1260
[174–183]
1200–1260
[174–183]
1200–1260
[174–183]
Retarder Charge Pressure–kPa [psi]
250–370
[36–54]
215–280
[31–41]
140–240
[20–35]
Cooler In Pressure–kPa [psi]
250–340
[36–49]
210–300
[30–44]
140–255
[20–37]
Cooler In Temperature–°C [°F]
150 [300] Max (Ref)
150 [300] Max (Ref)
150 [300] Max (Ref)
Table B–4. Retarder Specifications At Above Test Conditions
Parameter To Check
High Capacity
Medium Capacity
Low Capacity
Main Pressure–kPa [psi]
1120–1270
[162–184]
1120–1270
[162–184]
1120–1270
[162–184]
Retarder Charge Pressure–kPa [psi]
375–480
[54–70]
345–450
[50–65]
325–420
[47–61]
Cooler In Pressure–kPa [psi]
360–530
[52–77]
310–510
[45–74]
290–480
[42–70]
Cooler In Temperature–°C [°F]
150 [300] Max (Ref)
150 [300] Max (Ref)
150 [300] Max (Ref)
