Page
21
NOTICE
The procedure for fluid cylinder
installation is presented separately
due to the special and critical nature
of the connection between the power
end and the fluid end.
Fluid Cylinder Installation
1. Check all twelve stay rods for thread
damage or cracks. If replacement is
required,
refer
to
the
torque
specifications
on
page
34.
This
connection is critical.
2. Thoroughly clean the ends of the stay
rods. Apply grease or never-seize to the
threads.
3. Positions the fluid end on the stay rods
and slide the fluid end onto the stay
rods until it bottoms out on the stay-rod
shoulders.
4. Install the two outer-most Heavy Hex.
Nuts and hand tighten. Now it is safe to
remove the lift and sling. Install and
hand tighten the remaining heavy hex
nuts.
5. Using a hydraulic tensioning tool or
torque wrench, torque all hex nuts to the
torque specifications shown on page 34.
Use a “Cylinder-Head” sequence. These
nuts must be kept tight. Under-torqued
nuts will lead to thread fatigue failure of
the stay-rods.
6. Re-install the plunger clamps, piping
connections
and
auxiliary
equipment.
FIGURE 4-1 HD-2250 Fluid End, Stay Rods
and Hvy. Hex. Nuts.
Valve Cover Removal and Installation
Hammer Wrench Style Covers
Removal Procedure:
1. Disengage the valve cover from the
retainer by inserting the “Hex Retainer
Tool” through the retainer until it
contacts the valve cover and tapping
the tool over the hex with a hammer as
shown.
2. Loosen the cover retainer by striking the
handle of the “Hex Retainer Tool” with a
hammer
in
a
counter
clockwise
direction, as shown, until the retainer
loosens from the fluid end. (Repeat step
one as required).
3. Once the retainer is loose, complete the
cover removal by continuing to rotate
the tool and/or cover in a counter
clockwise direction.
Installation Procedure:
1. Apply a light coating of grease to the
valve cover seal(s), retainer threads,
and retainer face before installation.
2. Install the valve cover and retainer into
the fluid cylinder.
Содержание HD-2250
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