2 IMPORTANT When making repairs to the hydraulic system, keep the work area and parts clean. Use caps and plugs on all open lines and ports. Oil level C3431 2-15 GEAR PUMP REPLACEMENT 2.8 Start the gear pump removal procedure by removing any attachment, raising the boom arms and engaging the boom support pins. Shut off the engine. 1 Remove the seat and hydrostatic shield. Reservoir filler spout Vacuum C3428 WARNING To prevent personal injury do not work under the boom arms without the boom supports engaged. 2 Attach a vacuum system to the hydraulic oil reservoir filler location. ( fig. C3428 ) Or drain the oil reservoir.
Seal the threads on the drain plug, if removed, with teflon tape or a liquid form of pipe sealant before reinstalling. 3 Disconnect the hydraulic hoses from the gear pump. ( fig. C3448 ) Remove the pump fittings. Cap all open hoses to prevent contamination. After capping ends you may unhook vacuum system from oil reservoir. 4 Remove the 2 bolts holding the gear pump to the hydrostatic tandem section. ( fig. C3449) Remove the gear pump. 5 Replace gear pump in reverse order. C3428 IMPORTANT If gear pump replacement is being done because of failure, the hydraulic system and oil should be checked for contamination.
6 If the hydraulic system has been contaminated by pump or other failure you must follow the cleaning proce- dure outlined in section 2.7. 7 Start the engine and check for leaks. Do not use your hands to find leaks. WARNING Use caution when dealing with hydraulic fluid under pressure. Escaping fluid under pressure can pene- trate the skin and cause serious injury. 8 Check the fluid level in the hydraulic oil reservoir and replenish as required. (fig. C3431)