IMPORTANT: Use caution when clamping gear pump in a vise to avoid distorting any pump compo- nents.
3.Secure the front cover of the pump in a vise with the drive shaft pointing down.
4.Loosen the four (4) cap screws that secure pump as- sembly.
5.Remove pump from vise and remove fasteners.
6.Support the pump assembly and gently tap the pump case with a soft face hammer to loosen the pump sec- tions. Be careful to not drop parts or disengage gear mesh.
IMPORTANT: Mark the relative positions of the gear teeth and the thrust plates so they can be reassem- bled in the same position. Do not touch the gear sur- faces as residue on hands may be corrosive to gear finish.
7.Remove the thrust plates and seals from each pump section. Before removing each gear set, apply marking dye to mating teeth to retain ”timing”. Pump efficiency may be affected if the teeth are not installed in the same position during assembly. Keep the parts for each pump section together; do not mix parts between sections.
8.Clean all parts. Check all components for burrs, scoring, nicks and other damage.
9.Replace the entire pump assembly if parts are ex- cessively worn or scored.
Assembly (Fig. 50)
1.Apply clean hydraulic oil to all parts before assem- bling.
NOTE: Pressure seals and
2.Assemble pump sections starting at front cover end. Apply grease or petroleum jelly to new section seals to hold them in position during gear pump assembly.
3.After pump has been assembled, tighten cap screws and nuts by hand. Rotate the drive shaft to check for binding. Protect the shaft if using a pliers to rotate shaft.
4.Tighten the four (4) cap screws evenly in a crossing pattern to a torque of 33
Hydraulic System
Groundsmaster | Page 4 | Hydraulic System |
