RuggedMade MHP13-20, Owner'S Manual & Parts List

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9
minute. If the flow rate is incorrect go to next paragraph. If flow rate
is correct go to paragraph 6.
6. If the Power-On-Demand (POD) cylinder is working correctly, the
speed of the engine will need to be adjusted by repositioning the POD
in its bracket. Slacken off the clamp screw in the POD bracket and
adjust the position of the POD so that the engine speed is increased or
decreased as required to give 20 litres per minute flow. Retighten the
clamp screw. If the pressure reading has changed carry out check 4
above and continue to readjust as required.
7. Check the relief valve setting by screwing in the pressure-loading
valve until the pressure reading is 138 bar (2
,
000 psi). At this
reading the flow should be starting to fall off as the pressure relief
valve is beginning to open. If this is not happening the relief valve
will need adjusting. Slacken off the lock nut and unscrew the
adjusting screw until the flow just starts to drop off. Retighten the
lock nut. If on screwing the pressure-loading valve in it is not
possible to achieve a pressure of 138 bars it may be that the relief
valve has opened prematurely. In this case, with the pressure-
loading valve screwed right in, slacken off the lock nut on the relief
valve, screw in the adjusting screw until the pressure reading is 145
bars and retighten the lock nut. Slacken off the pressure-loading
valve to give a reading of 138 bars and check the flow rate. Carry out
further adjustments as required.
8. Whilst carrying out these checks ensure the oil temperature does
not exceed 60
℃
.
9. Carry out a functional test by operating a tool, preferably a breaker,
and checking for satisfactory operation.
Method 2:
1. Remove the protective upper cover in the front of the power pack.
2. Connect a pressure gauge (range more than 50MPa) to the oil
outlet of the switching valve.
3. Turn off the switching valve (the switching handle at OFF
position).Start the engine and warm up about 5 minutes.
4. Using the engine tachometer test the engine speed.
5. Adjust the bolt in the overflow valve of the switching valve to the
outermost (make the system pressure minimum).
6. Turn on the switching valve (the switching handle at OFF position),
watch the pressure gauge registration and engine speed.
7. Adjust the bolt of the cartridge valve inward slowly, make the
pressure gauge registration around 70-80 bar. Watch the POD work,
the engine speed should be 3400rpm.
8. If the engine speed is not 3400rpm, adjusting the POD position to
make the engine speed at 3400rpm ±50