Labrie EXPERT Maintenance Manual page 235

Thoroughly clean the tie rods, nuts and washers, and lightly lubricate the threads of the tie rods.
2.
On the inlet section of the valve assembly, use an o-ring pick to remove and discard the old o-
rings.
3.
Clean the inside face of the plate, and inspect for cracks, abnormal wear, rust or uneven sealing
surfaces.
4.
Slide the tie rods through the inlet cover and stand it upward (on end).
5.
Lubricate the o-rings with petroleum jelly and install them into their corresponding seat in the
inlet section.
Ensure the o-rings are pushed fully and evenly into their seats.
6. Starting with the first valve work section, clean the sealing surface of the valve work section, and
inspect for cracks, abnormal wear, rust or uneven sealing surfaces.
7.
Carefully lower the valve work section over the tie rods and mate it to the end plate.
8.
Using an o-ring pick remove and discard the old o-rings.
9.
Clean the seats in the o-ring seal face and inspect for cracks, abnormal wear, rust, or uneven
sealing surfaces.
10.
Using petroleum jelly, lubricate and install the new o-rings, ensuring they are seated fully into
their corresponding seats.
Figure 3-320 Seal configuration
11.
Repeat steps 6-10 with the remaining valve work sections.
12.
Ensure that the flat sealing surface of the valve end cap is clean and inspect it for cracks, abnormal
wear, rust, or uneven surfaces.
13. Carefully lower the valve end cap over the tie rods and mate it to the valve work section.
14. Install the washers and nuts on the tie rods.
15.
Using a 3-step torque method, torque the tie rods to 75 ft-lbs (102 Nm).
16.
Starting with the first valve section, use the ½" socket and ratchet and remove the bolts attaching
the spool actuator to the valve work section.
17. Using the large Phillips driver remove the 2 screws attaching the spool eye end dust boot and seal
plate.
General Maintenance 225