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Hydraulic
Pushrods for Clark Engines
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Filling
and Bleeding Instructions for
Clark BA, Clark HBA, Clark HLA, and Clark TLA
- Be sure
the lifter units and barrels do not contain any foreign matter.
- Clamp the
lifter upright in a vise below the outer tube on the bottom
2" of the pushrod. Slip the inner barrel out.
- Fill the
reservoir with 10W-40 weight oil or equivalent. Other oils are
used in special cases. (Check with a CECO Sales Representative.)
- Insert
the inner barrel into the pushrod and work it down until the
cap is almost even with the top of the brass bushing. (NOTE:
The lifter should be spongy at this point.) Press down on the
lifter 2 or 3 times to be sure the unit is seated properly and
the spring is still intact. The cap should return to the same
position each time it is fully released.
- Insert
a piece of clean, bare wire or rod, long enough to reach the
lifter unit ball check, through the hole in the top of the cap.
(NOTE: The wire must not be larger than 1/8" in diameter.)
The weight of the wire alone is sufficient to hold the check
valve open and allow the oil to flow into the inner chamber
of the lifter unit.
- With the
wire holding the check valve open, pull down on the cap until
the lifter is bottomed out. Release and repeat 3 or 4 times,
with the wire holding the check valve open. On the last stroke,
hold the cap all the way down and lift the wire out. Let the
cap return to its relaxed position. The lifter should act solid
almost instantly when any downward pressure is applied to the
cap. Repeat 2 or 3 times or until there is no sponginess.
- If the
lifter is to be stored for any length of time, it is necessary
to seal the upper and lower barrels with tape and plug the upper
Teflon insert. If possible, store in an upright position.
- CECO Magnum
Hydraulic Pushrods should be inspected once a year. If the oil
is contaminated, wash out the pushrod with a clean solvent.
Replace with clean oil. Magnum units must be kept clean.
Installation
and Maintenance
-
Remove the rocker arm and replace the existing screw with
CECO Magnum screws. Check rocker arm bushing for proper clearance.
- Remove
the existing pushrod and replace with CECO Magnum pushrod.
Adjustments
-
Set the fuel valve tappet screw as flat as you can on the
fuel valve and lock.
- With the
#1 cylinder on TDC (Top Dead Center), screw down on the pushrod,
adjusting the screw several times, let the pushrod bleed down.
You will have to wait several minutes for the pushrod to bleed.
The more you screw down on the pushrod, adjusting the screw,
the faster the pushrod will bleed. After the pushrod has bled
down past the red adjusting line or, 1/8" gap, turn the
adjusting screw up until you are able to see the red line or
have a 5/16" gap. (NOTE: The older CECO pushrods do not
have the red adjusting lines on them.
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