CHAPTER 6 8454
6-76
D569-W02 May-2003
D. TROUBLE SHOOTING
1.Install the flow rate gauge on the outlet of pump (refer to the sche-
matic Diagram).
2.Check the discharged flow rate.
First pump rated flow rate: normal if over 26.5
/min. (7.0 U.S.gal/min)
Second pump rated flow rate: normal if over 15.9 /min (4.2 U.S.gal/min)
(engine rotation: 2600, based on pump efficiency 85 %)
ref.) Calculation formula of flow rate
Q = (gear ratio x engine rotation x pump capacity) / 1000
Replacement
- 200 hrs (replace after initial use of 50 hr)
- When filter warning lamp is lit on the indicator panel.
In case of the failure of orbitrol unit & steering cylinder, check the
following:
1.Install the pressure gauge in the hydraulic hose assembly (rh, lh)
(ref. To schematic diagram).
2.Rotate the handle till the noise of relief is generated.
3.Check the pressure from the pressure gauge.
- Standard pressure: more than 120 kg/cm
2
(1,707 psi)
In case that the rotation of handle is not available, check the following.
1.Check the leakage of oil from steering cylinder ass’y.
2.Check the connection of hydraulic hose.
3.Check the pressure is below standard pressure (120 kg/cm
2
, 1,707 psi)
- Check and replace hydraulic pump and orbitrol unit.
* Assembly position of orbitrol unit hydraulic hose
(ref. To schematic diagram).
Hydraulic hose ass’y P: assembled
with hydraulic pump
Hydraulic hose ass’y T: assembled
with prior valve
Hydraulic hose ass’y L: assembled
with steering cylinder
Hydraulic hose ass’y R: assembled
with steering cylinder
Components Trouble Checking Remark
Hydraulic pump
Hydraulic filter
Orbital unit &
steering cylinder
569W6A5A
www.mymowerparts.com
K&T Saw Shop 606-678-9623 or 606-561-4983
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