Multiquip EHTX44Y5 operation manual Hydraulic Pump Pressure Test Ports

mAINTENANCE

To access the right and left hydrostatic pump test ports, remove the grill guard. It is best to use two gauges simultaneously, but it is possible to use only one gauge and repeat the procedure for each side.

Connect the pressure gauges to right and left test ports as shown in Figure 47.

To fully test the hydrostatic system, the spiders will need to be locked so that they cannot rotate. This can be done by wrapping a chain around an arm on each spider, thus chaining them together in the back of the trowel.

Once the pressure gauges are installed and the spiders chained together, the system can be checked.

With the foot pedal in the idle position and the engine at full speed, the pressure should be 150 to 250 psi. If the pressure is less than 150 psi, the charge system may need to be inspected and/ or serviced. In particular, the suction filter and charge pump relief valve should be checked. The suction filter may be plugged, or the relief valve may be stuck. Either condition may cause low charge pressure.

With the engine at 50% to 70% of full speed, and spiders chained together, slowly depress the foot pedal and read the gauges. The pressure should get to at least 3,625 psi (250 bar). If the pressure will not attain 3,625 psi (250 bar), the pump should be inspected and/or serviced by an authorized service representative.

PRESSURE GAUGE

(5,000 PSI)

	2000	3000
1000	150	200	4000
	100	250
	50	300

bar

psi 5000

WIKA

PRESSURE GAUGE

(5,000 PSI)

	2000	3000
1000	150	200	4000
	100	250
	50	300

bar

psi 5000

WIKA

RIGHT-SIDE

HYDROSTATIC

PUMP TEST PORT

QUICK DISCONNECT

DIAGNOSTIC FEMALE

COUPLER

LEFT-SIDE

HYDROSTATIC

PUMP TEST PORT

Figure 47. Hydraulic Pump Pressure Test Ports

page 40 — eHtx44y RIDE-ON TROWEL • operation manual — rev. #0 (01/16/13)