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Hydraulic Compressor Assembly (if ordered)
Plumbing
A) Attach the hydraulic pressure gauge to the port on the hydraulic block labeled GP (may already be assembled).
B) Remove the cap from the – 6 port (also labeled P on the Hydraulic Control Block) & install the 2515-431 – 6 ORB (O-
Ring Boss) to – 6 JIC straight adaptor fitting so that the O-Ring end goes into the hydraulic block & the JIC end faces
away from the block. Install 1) 2515-831 3/8 – 6 10ft hydraulic hose to that fitting.
C) Remove the cap from the – 8 port (also labeled T on the Hydraulic Control Block) & install the 2515-833 – 8 ORB to – 8
JIC straight adaptor fitting so that the O-Ring end goes into the hydraulic block & the JIC end faces away from the block.
Install the 2515-832 ½ – 8 10ft hydraulic hose to that fitting.
C) Remove the cap plug from the – 4 port on the motor using a 3/16 hex key wrench or screwdriver if this has a rubber plug
(this is the Case Drain port) & install the 2515-848 –4 ORB to – 6 JIC 90 degree adaptor fitting so that the O-Ring end
goes into the hydraulic motor & the JIC end faces downward. Install 1) 2515-831 3/8 – 6 10ft hydraulic hose to that fitting.
Attach 1 pioneer coupler to the ½" hydraulic hose for the compressors return using -8JIC – -8ORB adaptor. Attach 1 pioneer
coupler to the 3/8" hydraulic hose for the compressor pressure using -6JIC – -8ORB adaptor. Connect the hydraulic hose
attached to case drain on the motor to the case drain connector on the tractor. Case drain coupler not provided. The Yetter hyd.
compressor is equipped with a case drain port on the motor. Case Drain is a pressure free circuit that provides a flow path to the
reservoir for hydraulic fluid used to cool & lubricate the motor. Make sure to connect case drain to reservoir where the hydraulic
flow to the compressor is received. If tractor isn't equipped with case drain, a kit may be purchased from the tractor OEM dealer.
PIONEER COUPLER
Assembly Instructions
CASE DRAIN FLAT FACE COUPLERS
CONNECTED AT TRACTOR DRAIN
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