Usage:
416B (8SG, 8ZK),
426B (5YJ),
436B (6MJ),
428B (7EJ),
438B (3KK) Backhoe Loaders
The B-Series Backhoe Loaders have a torque limiter control mounted on top of the hydraulic pump. The purpose of the torque limiter control is to limit flow under conditions that may cause the engine to stop. Normally, no adjustment is required to this valve. If an adjustment is necessary, the following adjustment procedure can be used. This method of adjustment ensures the setting of the torque limiter to provide optimum use of the engine power.
1. Connect a flow meter to the front end lift control lines.
2. Set engine at low idle with the air conditioner on (maximum load you can put on engine). Hydraulic oil temperature should be a minimum of 50°C (122°F).
3. Set lift spool to maximum flow position and load circuit using the flow meter from 6890 to 10 335 to 13 780 kPa (1000 to 1500 2000 psi), then in 689 kPa (100 psi) steps up to 17 225 kPa (2500 psi).
NOTE: Pressures used are signal pressures. Record RPM and flow rate.
4. If engine continues to lug down after 15 158 kPa (2200 psi) is reached, adjust torque limiter OUT to decrease load.
5. If engine RPM climbs before 15 158 kPa (2200 psi), increase load by adjusting torque limiter IN.