Greensmaster 3300/3400 Hydraulic SystemPage 5 -- 63
4. Loosen the four (4) socket head screws that secure
pump assembly.
5. Remove pump from vise and remove fasteners.
6. Supportthepumpassemblyandgentlytapthepump
housing with a soft face hammer to loosen the pump
sections.Be carefultonot droppartsor disengagegear
mesh.
IMPORTANT: Marktherelative positions ofthe gear
teeth and the thrust plates so they can be as-
sembledinthesameposition.Donottouchthegear
surfaces as residue on hands may be corrosive to
gear finish.
7. Removethe thrustplates andseals fromeachpump
section. Before removing each gear set, apply marking
dye to mating teeth to retain ”timing”. Pump efficiency
maybe affectedifthe teetharenot installedinthesame
positionduringassembly.Keeptheparts foreachpump
section together; do not mix parts between sections.
8. Clean all parts. Check all components for burrs,
scoring, nicks and other damage.
9. Replacetheentirepumpassemblyifanypumpcom-
ponents are excessively worn or scored.
Gear Pump Assembly (Fig. 40)
1. Apply clean hydraulic oil to all parts before assem-
bling.
NOTE: Pressure and back--up seals fit in grooves ma-
chinedintothrustplates.BodyO--ringsfitingroovesma-
chined in housing.
2. Assemble pumpsections startingatfront coverend.
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 socket
headscrewsbyhand.Rotatethedriveshafttocheckfor
binding.Protect theshaftif usinga pliersto rotateshaft.
4. Tightenthe socketheadscrews evenlyin acrossing
pattern to a torque of 33 ft--lb (45 N--m).
Hydraulic
System
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