TANDEM PUMP REPLACEMENT 2.9 Upon reassembly, inspect the outside area of the tandem pump housing for damage that may have occurred in tran- sit or handling. 1 Attach a lifting device to the tandem pump. 2 Install the lower charge pressure inlet fitting to the tandem pump and attach the brake valve hose. (fig. C3478) Follow the torque chart on page 2 - 43. 3 Install the tandem pump to the loader. Charge pressure inlet fitting 2 WARNING To prevent personal injury, do not attempt to lift heavy objects without assistance. C3478 4 Line up the u-joint to the tandem pump input splined shaft as you guide the pump into it’s mounting location. ( fig. C3479) 5 Install the 2 rear mounting bolts.
6 Line up the front mounting brace holes and install the bolt. (fig. C3451) 7 Torque the 2 rear mounting bolts to 60 ft/lbs. (82 N.m.) Torque the front pump bracket mounting bolt to 50. (68 N.m.) Torque the front lower mounting bracket bolt at 20 to 25 ft/lbs. (32 N.m.) Remove the lifting device. Line up pump spline to u-joint yoke C3479 8 Connecting the 4 high pressure drive hoses and fit- tings to the tandem pump can only be accomplished in a certain sequence. (fig. C3480) Follow the Torque Chart in Section 2.13, page 2 - 43 when tightening fittings and hoses. If you have removed the hoses completely use the following pattern to reconnect: A Hose no.
4 connects to the bottom port of the right hand drive motor. B Hose no. 1 connects to the bottom port of the left hand drive motor. C Hose no. 2 connects to the top port of the left hand drive motor. D. Hose no. 3 connects to the top port of the right hand drive motor. Front mounting brace Bolt C3451 Lower mounting bolt High pressure hose layout 9 Connect the charge inlet hose from the oil filter to the tandem pump. Torque the fittings and hoses according to the Torque Chart in Section 2.13 page 2 - 43. IMPORTANT 3 2 When making repairs to the hydraulic system, keep the work area and parts clean. Use caps and plugs on all open line and ports 1 C3480 4 2-17