Table of Contents
Advertisement
SECTION 4
SERVICE PROCEDURES
This section describes various assembly
and disassembly procedures necessary for
pump servicing or parts replacement. The
General Requirements and Safety Rules
section is a reminder for the maintenance
personnel of the critical importance of safety
rules and precautions while working on the
pump.
Notes on dangers and notices
specifically related to service procedures
are repeated and placed in this section as
well.
The pump consists of two major modules:
(1) the fluid end and (2) the combination of
power end and gear reduction unit. (See
Section 3) The description of service
procedures follows the modular concept.
Due to many expendable parts, fluid end
servicing is rather common in the field and
is therefore presented in the very beginning
followed by power end and gear reduction
unit servicing procedures.
General Requirements and Safety Rules
DANGER
Before making any attempt to work
on the pump, all safety rules and
precautions described in this manual
must be read and clearly understood.
DANGER
Only qualified and specially trained
personnel should be allowed to work
on this pump.
DANGER
Proper capacity hoist and lifting
devices
should
working on pump.
be
used
while
301THD996
FLUID END SERVICE
This discussion starts with the description of
steps necessary for removal and installation
of the fluid cylinder assembly and proceeds
to
the
removal
and
expendable parts such as valves, valve
seats, plungers and packing.
Fluid End Removal
1.
Disconnect suction manifold from unit
piping and discharge lines at the
discharge flanges on the fluid end,
plunger lubrication lines, and also any
accessories such as stroke counters,
pressure gages, etc. off the fluid end.
2.
Open any cover(s) on the top of the
cradle and disconnect the plungers
from the extension rods by removing
plunger clamps.
3.
Slide the plungers inside the fluid
cylinder as far as possible, taking care
not to damage the plunger or pony rod.
4.
Connect hoist to the fluid end and
tighten the slings until they are snug
only. Make sure that hoisting slings are
not too tight, because that may induce
some strain on the stay rods and
damage the threads when the cylinder
is removed.
5.
Remove the twelve (12) 1-3/4" tie rod
nuts from the fluid end flange using a
hydraulic tensioning tool or hammer
wrench. (A hydraulic or manual torque
wrench is recommended for proper re-
installation).
6.
Pull the fluid end assembly horizontally
forward, straight away from the power
end until it is completely clear of the tie
rods.
7.
Move the fluid end to the service area
for changing valves or other service.
Page 20
replacement
of
Hide quick links:
Advertisement
Table of Contents
