Wing lift & fold cylinder repair – Alamo HYDRO 15 User Manual

Page 88

HYDRO 15 (Service Manual) 10/06

Alamo Industrial

Section 5 - 14

WING LIFT & FOLD CYLINDER REPAIR

12.

Coat the O-Ring & Back-Up Washer Seal

(figure 11 item 4)

with light coat of hydraulic oil.

Holding the cylinder rod

(figure 11 item 3)

straight slide the cylinder head down cylinder rod until

the threads are at the threads of the barrel.

(Important !) Apply a drop of locktite 242 in 3 places

(120° apart) on the first two threads of the cylinder

head.

Making certain the cylinder rod is straight

thread the cylinder head clockwise

(RH threads)

into the barrel. This can be done by hand if the

threads are in good condition, once the threads are started straight, a two pin spanner wrench

(figure 13)

can be used to tighten cylinder head into barrel

(read step 14 about spanner wrench)

Tighten the cylinder head until it is fully seated against barrel, the two pin holes for the spanner
wrench should be straight up and down from the barrel ports as shown

(Figure 12 item 4)

. The

cylinder head should be tughtened to what would be equal to 100 ft. lbs of toque.

13.

Using a new O-Ring install the vent plug

(figure 12)

in the base end cylinder barrel port. Install

the pressure hose and existing fittings using a new O-Ring into the rod end of barrel

(figure 12).

When first using the rebuilt and/or new cylinder it is not unusual for a light amount of oil to be pushed
out of the vent. The amount is the amount that was used to oil components during assembly. If
excessive amount leaks through vent cylinder is not functioning properly. Recheck the assembly
steps for possible assembly error.

14.

A Spanner wrench

(figure 13)

can be pur-

chased commercially or it can be built by the
repair technician. The Pins will need to be the
same size and width as the two holes in the cyl
head. The opening in the center must be large
enough not to hit the cylinder rod. The wrench
must be built of material thick enough it will withl
stand the pressure and handle is long enough to
give the leverage needed when turning cylinder
head. When using a spanner wrench it is recom-
mended that the cylinder rod be covered well by
wrapping and taping cardboard around it to
protect the rod, or wrap a cloth around rod.

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Figure 12

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Cylinder Ports and two pin holes
in cylinder head are aligned
straight up

1234

Vent Plug

Pressure Hose

c c c ccc

cccccc

ccccccc

cccccccccc

Figure 13