Installation Guide
17 
MR6.5K-38 
Feb 2020 
IMPORTANT 
POWER UNIT PRIMING PROCEDURE 
THE PROBLEM: Power unit runs fine but will not pump any fluid. 
Step 1 – Locate the check valve. It is the plug to the left of the lowering valve. 
Step 2 – Using a Hex wrench and shop towel – with shop towel in place to catch fluid – loosen 
the check valve plug by approximately 2-½ turns and allow fluid to bleed off. 
Step 3 – Push the START button for one second, then release for three seconds. Repeat 
these steps until unit starts pumping fluid. 
Step 4 – Tighten the check valve plug. 
YOUR POWER UNIT SHOULD NOW BE PRIMED 










