Giant MP4130-3100, Руководство по эксплуатации

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Gear End Disassembly
Note: Make certain that the plungers (29B) have been removed before starting the following sequence.
12. Make sure the oil is drained from the pump before removing the crankcase cover (#4). Remove all screws (#10).
Inspect the crankcase cover o-ring (#5) for damage and replace it as necessary.
13. Remove the connecting rod screws and washers (#’s 24A and 24B) with a 6mm allen wrench. Remove the back
halves of each connecting rod (#24) . Push the connecting rods down as far as possible into the crankcase
(#1) housing.
Note that the connecting rod halves are numbered (or colored) and that the numbers (or
colors) must be matched for reassembly.
14. Remove the crankshaft bearing cover screws (#17) with a 13mm wrench. Remove the key (#23) from the
crankshaft (#22).
15. Remove the bearing cover (#14) and any shims (#20A) if any. Remember to replace shims on the same side
of the crankcase (#1) during the reassembly.
16. Steady the pump gear end and, using a rubber mallet, tap the crankshaft (#22) from one side. The far side
bearing race will be removed and the near side race will remain in the crankcase. The roller bearings (#20) will
remain on the crankshaft. When both ends are free, the crankshaft can be removed by hand.
17. To remove the remaining bearing race, place a dowel against the inside edge of the race and tap it out with a
rubber mallet. This is done only if the race wear surface has been damage.
18. Inspect the bearing race removed with the crankshaft (#22) and replace if wear surface is damaged.
19. Note: The following procedure is only necessary if the inspection shows evidence of heavy wear. Inspect
the crankshaft (#22) and bearings (#20) for wear. To remove the roller bearings from the crankshaft, use a three
inch push puller with a pulley attachment. To remount the bearings, tap the bearings down the well-lubricated
crankshaft with the Giant Bearing Tool. Be sure that the bearing is firmly seated.
20. Remove the connecting rod (#24) with the attached crosshead/plunger assembly (#25) from the crankcase (#1)
by pulling it straight out. The oil seals (#31) may now be removed by tapping them out through the front of the
crankcase. Be careful not to damage the snap ring.
21. Inspect the surfaces of the crosshead/plunger assembly (#25) and connecting rods (#24) for heavy scoring or
galling due to poor lubrication. Check for play at the joint between connecting rod crosshead/plunger assem-
bly.
22. To remove the crosshead pin (#28) from the crosshead/plunger assembly (#25), the assembly should be posi-
tioned in such a manner to prevent damage to the crosshead when driving the pin out. The crosshead pin can
be driven out by tapping on the tapered side of the pin
Reassembly sequence
Note: Always take time to lubricate all metal and nonmetal parts with a light film of oil before reassembly. This
step will help ensure a proper fit, at the same time it will protect the pump nonmetal parts (elastomers)
from cutting and scoring.
23. Take the crosshead/plunger rod assembly and insert the connecting rod (#24) into the crosshead/plunger as
-
sembly (#25). Drive the tapered end of the crosshead pin (#28) into the beveled side of the crosshead and
through the connecting rod completing the assembly.
Note: The crosshead pin should not extend beyond either side of the crosshead in order to prevent damage to
the crosshead bore of the crankcase.
24. Inspect the crankcase crosshead guides for any possible damage.
25. Replace the connecting rod (#24), crosshead/plunger rod assembly (#25) into the crankcase (#1).
26. If removed previously, replace the far side bearing race into the crankcase. Tap with a rubber mallet until the
edges are flush with the crankcase surface.
27. Remove the old crankshaft seal (#15) from the bearing cover (#14). Lubricate the edges of the new seal and
install using the standard Giant Bearing Tool. Remove the bearing tool and tap around the perimeter of the seal
with a rubber mallet to firmly seat the seal. Position the far bearing cover on the crankcase (#1) and insert the
cover bolts (#17). Tighten the cover evenly to the crankcase, setting the bearing into position. Torque the cover
bolts to 125 inch-pounds (14 Nm).
28. Insert the crankshaft (#22) with the mounted bearings (#20) through the near side of the crankcase (#1). Make
certain that the numbers (or colors) or the crankshaft correspond to the numbers (or colors) on the
connecting rods (#24).
Reinstall the near side bearing race by inserting it into the crankcase. Supporting the
crankshaft with one hand, tap the race with a rubber mallet until the edge is flush with the crankcase.