Service Manual

Groundsmaster 360Hydraulic System Page 4 − 114
Assembly (Fig. 130)
NOTE: When assembling the pump, check the V−
shaped marker line made during disassembly to make
sure components are properly aligned.
1. Lubricate new O−rings, pressure seals and back−up
gaskets with a thin coat of petroleum jelly. Lubricate all
internal pump parts freely with clean hydraulic oil.
2. Install new shaft seal in front plate. Note orientation
of seal lips during installation (Fig. 132). Seal should be
pressed into place until it reaches the bottom of the bore.
3. Install retaining ring into the groove of the front plate.
4. Install lubricated O−rings to the body.
5. Install lubricated pressure seals into the machined
grooves of the bearing blocks and follow by carefully
placing the back−up rings into the grooves.
6. Lubricate gear faces and bearing surfaces of drive
gear, idler gear and bearing blocks with clean hydraulic
oil. Carefully assemble bearing blocks and gears noting
identification marks made during disassembly.
7. Position the pump body on its side. Carefully slide
bearing block and gear assembly into the body cavity
using identification marks made during disassembly.
8. Remove any excess lubrication from mating sur-
faces of body, back plate and front plate. Make sure that
these surfaces are clean and dry.
9. Install dowel pins in body.
IMPORTANT: Do not dislodge O−rings, pressure
seals or back−up rings during final assembly.
10.Gently slide the back plate onto the assembly using
marker lines for proper location. Firm hand pressure
should be sufficient to engage the dowel pins.
11.Place thin sleeve or tape on pump shaft splines to
prevent seal damage.
12.Position the pump with back plate downwards. Care-
fully slide the front plate onto the assembly using marker
lines for proper location. Take care to not damage the
seal during front plate installation. Remove sleeve or
tape from shaft splines.
13.Install the four (4) socket head screws with lock
washers and hand tighten.
IMPORTANT: When clamping the pump in a vise,
clamp only on mounting flange. DO NOT clamp
pump body in a vise.
14.Clamp mounting flange of pump in a vise with the
shaft end down.
15.Alternately torque the socket head screws 220 in−lb
(25 N−m).
16.If implement relief valve was removed from back
plate, install relief valve. Torque relief valve 220 in−lb
(25 N−m).
17.Put a small amount of hydraulic oil in inlet port of
pump and rotate input shaft one revolution. Place cou-
pler on input shaft and use pliers on coupler to rotate
pump shaft. If input shaft binds, disassemble pump and
repeat assembly process.
18.Remove pump from vise.