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

Page 82

HYDRO 15 (Service Manual) 10/06

Alamo Industrial

Section 5 - 8

WING LIFT & FOLD CYLINDER REPAIR

Cylinder Removal: (LH or RH Wing Cylinder)

Make Certain Wings are in the lowered position before disconnection any component. Make

certain tractor is securely parked with brakes set. Make certain tractor engine is in off position and
key secured to prevent starting. It is recommended mower be disconnected from tractor or battery
cable be removed from battery while repairs are being made.

Make certain that all hydraulic pressure has been released from lines after wings and axles

have been completely lowered. This may require the tractor hydraulic controls and / or remote
control valve be worked to release hydraulic pressure.

NEVER disconnect any cylinder hydraulic

hose's or fittings if all

mower components (wings and deck) are not resting in the completely

lowered to the ground position.

Remove the cylinder mounting pins

(figure 1 item 1)

, this allows the cylinder to be raised

upward off the wing lug and outward from the cylinder mount of the winch stand.

Before disconnecting the base end hose

(figure 1 item 2)

form the wing cylinder put a drain

pan under the hose connection at the base end of the cylinder. Begin to loosen the hose slowly,
If any hydraulic pressure is in the hose STOP and reread step 2 above. If no Hydraulic pressure,
continue removing the hose from the base end of the cylinder while keeping the hose and cylinder
over the drain pan. When hoseis removed hold cylinder over drain pan until oil has drained from
cylinder. Install a cap onto the cylinder hose to seal it.

Cylinder Dis-Assembly: (LH or RH Wing Cylinder)

Clamp cylinder to work bench

(DO NOT over tighten clamp and bend or distort the shape of

the barrel)

only tight enough to hold cylinder. Place a drain pan under cylinder head to catch any

oil that may leak out.

Pull the Cylinder Rod Clevis Weldment

(figure 2 item 3)

outward at least 3 inches, This will allow

the Cylinder Head

(figure 2 item 4)

to be unscrewed from Barrel

(figure 2 item 5)

using a

commercially available two point spanner wrench

(figure 13)

. The cylinder head will screw counter

clockwise out until it is away from the cylinder barrel. Hold the Cyl rod

(figure 2 item 3)

as straight

as possible when cylinder head is unscrewed.Keep drain pan under open end of barrel to catch
oil that may drain from barrel.

Pull the Cylinder Rod Clevis Weldment

(figure 2 item 3)

outward, it will pull the piston out of the

barrel

(figure 2 item 6).

When pulling the rod and piston out do it slowly, the amount of resistance

should be about the same all the way out, if you encounter a spot where the piston pulls easier
than others make a mark on the OD of the barrel approx where the piston is in the barrel. These
loose places may indicate a worn are that will need to be checked later. Pull the rod out slowly
holding the rod as straight as possible until the piston

(figure 2 item 6)

and cylinder rod weldment

pulls completely out of barrel

(figure 2 item 5)

. Be careful not to bump the threads on the cylinder

head or damage them.

Clamp cylinder rod clevis weldment in a vice (

figure 3)

on the clevis end as shown. Clamp the

rod with the mounting pin hole upward as shown

(See Rod Clevis Weldment figure 3)

, if the clevis

is clamped with the hole the other way, the clevis could be bent together and cause the clevis to
be deformed.

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Figure 1