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PAGE 42 — EHTX44Y RIDE-ON TROWEL • OPERATION MANUAL — REV. #0 (01/16/13)
MAINTENANCE
Pitch Pressure Check
To gain access to the pitch block (Figure 50), removal of
the right-rear seat frame panel may be necessary.
Pitch pressure must be measured with at least one of
the pitch switches activated. When pitch switches are
unactivated, the pitch pressure will be the same as the
charge/steering pressure. Proper pitch pressure is 2300
PSI (2250 - 2350 PSI).
Figure 50. Pitch Block Location
1. Install 3000 PSI range pressure gauge to pitch
pressure test port on pitch block, (Figure 51).
Figure 51. Pitch Pressure Test Port
PITCH BLOCK
PITCH PRESSURE
TEST PORT
3000
5000
bar
psi
4000
200
250
300
50
100
150
1000
2000
WIKA
PRESSURE GAUGE
(3000 PSI)
PITCH
BLOCK
PITCH
PRESSURE
TEST PORT
2. Press the left pitch rocker switch downward.
Figure 52. Pitch Pressure
(Left Pitch Rocker Switch)
3. The blades should fatten out (bottom out the pitch
cylinders).
4. Continue to hold down the left pitch rocker switch and
record pressure.
Pitch Pressure Out of Specification
If the pitch pressure check is not within specification, check
for the following:
Correct hydraulic fluid level.
Plugged hydraulic oil filter
Loose or leaking fittings.
Ruptured/damaged hydraulic lines.
Faulty hydraulic pump.
Pitch Pressure Relief Valve no longer at factory setting.
LEFT ROCKER
SWITCH
RIGHT ROCKER
SWITCH
DOWN
UP
NOTICE
The Pitch Pressure Relief Valve is SET AT THE
FACTORY, and normally should not require adjustment.
If all other systems are found not to be defective, then
the pitch relief valve is suspect, the following steps can
be used to adjust the valve.