Allied Systems Long Reach BHA Series Manual de instalação, manutenção e assistência técnica - Página 17

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Figure 5-2, Piston Rod Removal

4. Clamp the rod assembly in a soft jawed vise on the

wrench flats, not on the rod surface. If the rod does

not have wrench flats use two pieces of wood on both

sides of the rod to prevent scaring. (Figure 5-3)

Figure 5-3, Cylinder Shaft

5. Remove the piston retaining nut and remove the piston

assembly. (Figure 5-4)

45-053, REV. 5/18

Piston

Piston Seal

O-Ring

Piston Nut

Figure 5-4, Piston Removal

6. Slide the piston seal off the piston noting the direction

the seal is facing. When the new seal is installed make

sure it faces in the same direction.

7. Carefully pry up on the gland cap seals using a blunt

tip screw driver being careful not to scratch the seal

grooves. Cut the seals to remove from the gland cap.

(Figure 5-5)

Figure 5-5, Gland Cap Seal

5.5 Cylinder Inspection

Inspect the cylinder tube bore for:

1. Deep scratches or nicks.

2. Signs of galling or excessive wear.

3. Out-of-roundness or deformities of the barrel.

Inspect the piston for:

1. Scratches or nicks on seal grooves.

2. Wear on O.D.

Piston Follower

Wear Band