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Instruction Manual
High pressure piston pumps
TXT Series
Doc. code M.I. TXT-21
Rev. 0
Page 28 of 35
figure 3
6.2
Removal of mechanical parts
Remove parts as described below:
•
Empty the oil out of the crankcase through the drain plug;
•
Remove the key from the shaft;
•
Remove the cylinder head;
•
Remove the back cover;
•
Unscrew the connecting rod feet, making sure you remember the position of each one in relation to its connecting rod
(Figure 3);
•
Press the connecting rods towards the bottom of the crankcase;
•
Unscrew the bearing housings and take them off the crankcase;
•
Take the shaft out from the side through the housing hole on the PTO side;
•
The ceramic plunger and spray washer must first be removed before the plunger rods and their connecting rods can be
removed.
6.3
Assembly of mechanical parts
The mechanical parts are reassembled as follows:
•
Replace the plunger rods with their connecting rods if they were removed, pressing them down to the bottom of the
crankcase;
•
Insert the shaft at the side through the housing hole on the PTO side, making sure the PTO remains on the required side
of the crankcase (the shaft should still be inserted on the side without the PTO, supporting this with your hand);
•
Replace the oil seal if it is worn and then insert the two bearing housings in the crankcase holes, remembering to check
the wear rings are fitted. Tighten the 6 screws by applying 20 Nm torque;
•
Replace the connecting rod feet, taking care not to swap their positions and respecting the torque of 38 Nm;
•
Fit new oil seals on the plunger rod, if the latter were replaced;
•
Replace the rear cover and tighten the screws by applying 10 Nm torque;
•
Replace the plungers fitted with the splash washers if they were removed in order to remove the connecting rods and
their rods, tightening the plunger screws by applying 20 Nm torque;
•
Replace the manifold housing as instructed in section “6.6.2 Replacing the seals”;
•
Replace the shaft key.
6.4
Inspecting the bearings
After having disassembled the mechanical part, as described in the previous point, you should proceed to visually inspect the
rollers and their tracks.
Unless any abnormal wear is noted, proceed to clean the rollers and tracks with a solvent; once that is done, cover them with a thin
layer of lubricating oil (the same as the oil contained in the crankcase).
Once this operation is complete, you may replace the mechanical part as shown above.
If, on the other hand, the tracks or rollers show signs of wear, replace them as specified in the next step.
