Jacobsen SLF 1880, Техническое руководство по ремонту

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8N-98
REEL MOTOR PRESSURE TEST
The reel motors can be tested at the reel motor control
valves. There are two reel motor control valves. One
valve controls the front reels while the other controls
the center reels. The test for each valve is identical.
1. Shut off the engine and remove the ignition key.
2. Install a 3000 psi (2067 bar) pressure gauge with
a quick connect fitting to the quick connect fitting
on the reel motor control valve (Figure 8N-5).
3. Remove the reel motor pressure hose from port
“A” of the reel valve. Plug the hose and cap the
valve port “A” (Figure 8N-5).
4. Set the parking brake and start the engine.
5. Place the throttle at mid RPM range.
6. While observing the pressure gauge, place the
reel motors in the forward (ON) position.
7. The relief valve should open at approximately
3000 psi (2067 bar).
Conclusion
• If the relief valve opens within range, the relief valve
and reel (auxiliary) hydraulic pump are not at fault. A
reel motor may be at fault. Remove the plugs and
connect the hose to the reel valve. Add motors one
at a time to the circuit and repeat steps 4 through 7.
• If the relief valve does not open within range,
replace the relief valve.
• If the relief valve does not develop pressure within
range, perform a flow test on the reel (auxiliary)
hydraulic pump.
8. Shut off the engine, remove the gauge, place the
dust boot on the quick connect fitting.
9. Remove plugs from the reel motor hoses and
caps from the reel motors. Connect the hydraulic
hoses to the reel motor fittings.
10.If necessary, repeat the test on the other reel con-
trol valve.
Figure 8N-5. Rear Reel Motor Control Valve Testing
CAUTION
The plugs inserted into the reel motor hoses must be
able to withstand the maximum pressure developed
by the reel motor system.
NOTICE
The hose connected at Port “A” of the reel valve
could also be plugged and capped at the first reel
motor in the circuit to gain better access.
!
CAUTION
Do not allow the system to develop more that 3500
psi (2411 bar) hydraulic pressure.
!
Quick
Connect
Fitting
0 to 5000 psi
(0 to 34473 kPa)