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Hydraulic
Pushrods for Clark Engines
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Filling
and Bleeding Instructions for Clark
RA, Clark HRA, Clark HRSA and Clark TRA
- 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-30 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
-
Remove the rocker arm and replace the pushrod, adjusting the
screw with the CECO pushrod screw. Check rocker arm bushing
for proper clearance.
- Remove
the existing pushrod and take off the spring and spring hold-down
flange.
- Install
the spring gland, furnished by CECO, in the bottom of the cam
follower with the flat side down.
- Replace
the spring and spring gland. (It is not necessary to have the
CECO Magnum pushrods on the engine at this time.) Check the
seals in the spring hold down flange. Replace if necessary.
- Install
the CECO Magnum pushrod by sliding it through seal in the hold
down flange. (Put the lubricant on the end of the rod to keep
from damaging the seal.)
- Install
the rocker arm.
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 pushrods do
not have the red adjusting lines on them.)
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