Page 338 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

5 As seen in Fig 1 label the bottom row of bolts holes on the frame starting from the left corner to the right corner.
6 Install the bolts hand tight.
7 Check the clearance between the face of the fluid end and power frame. The clearance range is between
0.003” and 0.030”
This clearance should be approximately the same at all four corners before proceeding

If the clearance is not the same at all the four corners, remove the fluid end and clean the surfaces between
the mating faces of the power end counter bores, stuffing boxes, and fluid end, removing any debris or
surface imperfections such as corrosion or raised metal. Reassemble the unit and recheck the clearance.
8 Tighten the fasteners to required torque using a hydraulic torque wrench with a point socket or a hand tool
combination multiplier drive torque wrench, a drive extension, point socket. Use the same tightening.
9 Check the clearance between the face of fluid end and power frame . The clearance of 0.003” - 0.030” should
be approximately the same at each of the four corners.

10 Tighten the fasteners to required torque.
11 Recheck the clearance between the face of fluid end and power frame. The clearance of 0.003” - 0.030” should
be approximately the same at each of the four corners.

12 Verifying that each fastener is properly torqued as per manufactures instruction
13 Conduct a final check of the clearance between the face of the fluid end and power frame. The clearance of
0.003” - 0.030” should be approximately the same at each of the four corners.

Fig 1

B Plunger and packing Replacement
This service procedure can be performed with this fluid end in place on the pump, and consists of the following
steps:
1 Remove the suction cover retainer nut with the appropriate male hex wrench.
2 Remove the suction cover with a threaded “slide hammer type” puller.
3 If equipped, open the hinged cover on the top of the cross head housing to get access to the plunger/extension
rod area.
4 Remove both cap screws holding the plunger clamp, then remove the clamp.
5 Loosen the packing nut to free the plunger from packing pressure.
6 Remove the plunger through the suction cover opening.
7 Remove the packing nut, packing , and spacers.
8 Inspect the plunger, the packing, the rod wiper, the stuffing box bore, and the packing nut for excessive wear,
nicks burrs, or any other defects. Replace expendable parts as necessary.
9 Coat packing and stuffing box bore with a light grease or oil.
10 Install the packing in the packing bore with the packing lips towards the front of the fluid end (Fig 2)
11 Install and hand tighten the packing nut to align the packing in the bore.
12 loosen the packing nut to allow for installation of the plunger.

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CITS : Automotive - Mechanic Diesel - Exercise 18.5