Nilfisk-Advance 56110000, Service Manual

Page: 77 / 102

FORM NO. 56043124 - Condor XL
™
- 77
HYDRAULIC SYSTEM
HYDRAULIC VALVE BLOCK/MANIFOLD
HYDRAULIC SYSTEM TROUBLESHOOTING
Accurate measurements are the key to troubleshooting a hydraulic system. Once measurements are obtained, they can be compared with speci-
fi cations to analyze a problem.
You can use digital tachometers, fl ow gauges or pressure gauges to troubleshoot the hydraulic system. The pressure gauge should have a range
of 0 to 3000 psi (see the DIAGNOSTIC AND SERVICE TOOLS section) and have a Parker Diagnostics connector number PD222. The most con-
venient way to check for oil
fl ow is to check the RPM of the motor that is performing poorly. Refer to the GENERAL HYDRAULIC SPECIFICATIONS
TABLE to determine the motor RPM. If the motor speed is correct, the pump is producing the correct amount of oil fl ow. However, this does not
mean that if a motor is running too slow the problem is in the pump.
The following information should be used to check for correct motor RPM, system pressure and relief valve settings. The readings are nominal
fi gures and there will be variations due to manufacturing tolerances and system oil temperature. If any reading varies greater than 20 percent,
there will be a noticeable loss of performance and the problem should be corrected.