Lubrication 71
Testing Hydraulic Oil
It is recommended to have hydraulic oil tested and analyzed by a lab to prevent hydraulic system or
pump failures. This will also optimize the oil change frequency. Apply the following procedure to take
oil samples on Labrie vehicles.
NOTE: The procedure may differ from other laboratories’ sample kits.
Hydraulic Oil Sample Preparation
Before taking hydraulic oil samples:
1. Apply all safety measures to ensure safety around the vehicle at all times.
2. Locate the oil sample coupler.
It is located behind the filter cover which is on the top of the hydraulic tank.
Figure 4-1
Oil sample coupler
3. Remove the cap from the sample coupler and clean the coupler with a clean rag.
4. Push on the coupler spring ball using a small tip to purge oil before taking a sample.
The residual pressure in the system will push the oil out of the coupler. Use a small container to
recuperate the oil that will come out. Let the oil leak for a few seconds (about half a cup). During
this operation, the pump must be engaged.
Caution!
Highly contaminated hydraulic fluid must be changed promptly to avoid any damage to
the hydraulic system.
Filter cover
Sample
coupler
Hydraulic
tank
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