Tappet Assembly Installation - Lycoming TEO-540-C1A Maintenance Manual

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
19. Tappet Assembly/Installation
NOTICE: If a new a new or reconditioned camshaft is installed, lubricate and install tappets per
guidelines in the latest revision of Service Instruction Nos. SI-1011, SI-1059, and SI-
1514 for details.
Do not intermix tappet types on the same engine. Do not mix hyperbolic tappets with straight body
tappets in the same crankcase. straight body tappets or all hyperbolic tappets. Refer to the latest
revision of Service Instruction Nos. SI-1011 and SI-1514 for details.
A. Plunger Assembly Installation
CAUTION
NOTICE Hydraulic tappet plungers are to be replaced if damaged, or not operating correctly,
and at overhaul. These plungers can be replaced if the crankcase is opened close to
the time of overhaul.
(1) Clean and lightly coat the lifter parts with engine oil before assembly.
(2) To assemble the unit, unseat the ball (Figure 71) by inserting a thin clean bronze wire
through the oil inlet hole.
(3) With the ball off its seat, insert the hydraulic tappet plunger and turn it clockwise until the
spring engages.
© 2018 Avco Corporation. All Rights Reserved
November 2018
Hydraulic Hyperbolic Tappet
DO NOT MIX HYDRAULIC TAPPET PLUNGER OR LIFTER
ASSEMBLIES WITH DIFFERENT PART NUMBERS IN THE SAME
ENGINE. THE DIFFERENT LEAK DOWN RATES WILL CAUSE
INCORRECT ENGINE OPERATION.
ALL PARTS OF EACH HYDRAULIC PLUNGER ASSEMBLY ARE
SELECTIVELY FITTED AND ARE NOT INTERCHANGEABLE.
MATING PARTS MUST BE KEPT TOGETHER. IF THERE IS ANY
DOUBT AS TO WHETHER THE PARTS HAVE BECOME MIXED,
INSTALL NEW PLUNGER ASSEMBLIES.
Hydraulic Lifter
Figure 70
Figure 71
72-20
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