Hamilton Jet HJ241 Manual Download Page 109

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9.5

9 OVERHAUL

9.2 R

EVERSE

SSEMBLY

EMOVAL

AND

VERHAUL

HJ-241 / HSRX

• Check that the seal housing is free from damage

likely to harm the seal. Remove all sharp edges
and burrs from metal parts paying particular
attention to ports, grooves and threads over or
through which the seal must pass during as-
sembly.

• Clean all seal housing areas. Check that other

surfaces adjacent to the passage of the seal on
fitting are free of dirt, swarf or other contami-
nants.

• Where the difference between a thread diameter

over which as seal must pass and the seal diam-
eter is small, use some form of protection over
the thread, such as a fitting sleeve made of hard
plastic.

• Ensure that the seal has not been stored so that

it has been distorted. Store seals in a cool, dry
and dark place.

• Liberally smear the seal and metal component

with a clean fluid of the appropriate type, or a
compatible grease, before fitting the seal.

• Where seals, fitted to sub-assemblies such as

pistons, are awaiting further fitting operations,
ensure that the seals are not subjected to any
misaligned or localised loading which will
cause local deformation. Ensure sub-assemblies
remain clean.

• The use of metal levers is not recommended, but

should they be used, it is imperative that they
are completely smooth and free from nicks and
burrs. When using them, ensure that the metal
surfaces adjacent to the seal are not damaged.

ASSEMBLY OF THE REVERSE CYLINDER:
Refer to Drawing

HJ-241-07-001 Reverse Assembly

Sht1 & 2

The following Oils and Greases are recommended
for use during the assembly of the H.S.R.X. Reverse
Cylinder Assembly.

{A} BP Energrease MM EP2 or equivalent.

{B} Mineral based oil such as recommended

hydraulic oil. Refer to

Section

8 Maintenance

in the Controls Manual).

{C}Non Seize Compound. (Rocl YIGG, Jet-

Lube, Nikal, etc.).

1. Grease 'O' Ring Seal [18] {Using A} and fit to the

Reverse Cylinder Back Head [22].

2. Grease a second 'O' Ring Seal [18] {Using A} and

fit to the Seal groove in the Reverse Cylinder
Front Head [15].

3. Grease and fit the Piston Seal [21] to the Reverse

Cylinder Shaft Assembly [10], ensuring that the

Scarf Joints on the Seal Backing Rings are
correctly mated.

4. Grease and fit the 'U' Seal [17] to the Front Head

[15], ensuring that the Seal is correctly
orientated. Use the Installation Guide Tool, if
available.

Refer to Drawing

HJ-241-07-001 Re-

verse Assembly Sht1,

for correct positioning of the

Seal

5. Grease and fit the 'O' Ring [24] to the Back Head

[22], ensuring that the ‘O’ Ring is correctly
orientated.

Refer to Drawing

HJ-241-07-001 Re-

verse Assembly Sht1,

for correct positioning of the

Seal

6. If the Stop Pin [39] has been removed from the

Back Head [22], apply 7471 Activator to one end
of the Stop Pin and allow to dry. Apply Loctite
680 (or equivalent) to the same end of the Stop
Pin and fit the Stop Pin to the Back Head [22].

7. Apply Loctite 263 to one end of each of the 4 x

threaded Reverse Cylinder Tie Rods [27] and
tighten into the Front Head [15].

8. Grease both outside ends of the Cylinder [19]

{Using A} and push fit one end of the Cylinder
into the Front Head [15].

9. Lubricate the Cylinder Shaft Assembly [10]

{Using B} and fit to the Front Head [15].

It is

critical to protect the Oil Seal (17), so ensure that
the end of the Cylinder Shaft as well as the hole, are
deburred and there are no sharp edges present.

10.Ensure that the dot on the outer end of the

Reverse Cylinder Shaft Assembly is positioned
uppermost.

NOTE: If the dot on the Reverse Cylinder Shaft

Assembly is wrongly positioned, the Reverse
Cylinder will not function correctly.

11.Fit the Bearing [25] to the Back Head [22].

12.Lubricate the Spool [20] {Using B}.

13.Whilst supporting the Seal [24] in the Back Head,

insert the end of the Spool [20] fitted in the
cylinder, through the Bearing [25] and Seal [24]
already fitted to the Back Head.

It is critical to

protect the seal lip from damage, so ensure that the
end of the Spool Shaft is completely deburred and
free of any sharp edges.

14.Grease and fit the O Ring [56] to the forward end

of the Back Head [22].