Multiquip HTX44Y5 - Manual (Page 43)

HTX-YANMAR DIESEL • RIDE-ON POWER TROWEL — OPERATION MANUAL — REV. #0 (07/06/06) — PAGE 43
/02) — PAGE 43
HTX-YANMAR DIESEL — MAINTENANCE
Pitch Pressure Check
Access the pitch block and pitch pressure test port at the right-
rear of the trowel, (Figure 45). Removal of the right-rear seat
frame panel may be necessary. Pitch pressure must be measured
with a pitch switch
activated . With pitch switches unactivated,
the pitch pressure will be the same as the charge/steering
pressure. Proper pitch pressure is 2300 PSI (2250 - 2350 PSI).
Figure 45. Pitch Block
Figure 46. Pitch Pressure Check
1. Remove right grill guard and right rear seat frame panel.
2. With the engine OFF, remove the end cover on relief valve,
(Item A, Figure 47).
3. Adjust the relief valve, (Item B, Figure 47) with allen wrench
and reinstall the end cover.
4. Start the engine and check the pressure as described
earlier. (See Pitch Pressure Check)
5. If pressure requires further adjustment, shut the engine
down and repeat steps 2 through 4 until pressure check
reads 2300 PSI.
1. Install 3000 PSI range pressure gauge to pitch pressure
test port on pitch block, (Figure 46).
2. Activate left pitch switch.
3. Flatten blades (bottom out the pitch cylinders).
4. Continue to hold down pitch switch and record pressure.
Figure 47. Pitch Pressure Relief Valve
Pitch Pressure Out of Specification
If the pitch pressure check is out of specification, check for the
following:
1. Correct hydraulic fluid level.
2. Plugged hydraulic oil filter
3. Loose or leaking fittings.
4. Ruptured/damaged hydraulic lines.
5. Faulty hydraulic pump.
6. Pitch Pressure Relief Valve no longer at factory setting.
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 and the pitch relief valve is suspect, the
following steps can be used to adjust the valve.
NEVER allow the pitch pressure to exceed 2700 PSI or
equipment damage may result.
3000
5000
bar
psi
4000 200 250 300 50 100 150 1000
20 00
WIKA
1
2
3
1. Pressure Guage - 3,000 PSI Range
2. Access Pitch Block at Right-Rear of Trowel
3. Pitch Pressure Test Port
WARNING WARNING WARNING WARNING WARNING
DO NOT attempt to adjust the Pitch Pressure Relief Valve
while the engine is running.
CAUTION CAUTION CAUTION CAUTION CAUTION