Teledyne TSIO-360-RB, Maintenance Manual

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20-7
20-3 CYLINDER ASSEMBLY DETAILED DESCRIPTION (continued).
Hydraulic Tappet - See Figure 20-6. The barrel type hydraulic valve tappet consists of a
steel body (1), an expanding spring (2), a check valve assembly (3, 4 and 5), a plunger (6),
a socket (7) and a retaining ring (8). A groove (9), around outside of the body picks up oil
from the crankcase oil gallery. From the exterior groove oil is directed to the interior body
groove (11) through hole (10) and from the interior groove through the hole to the reservoir
(12). Oil is withheld from reservoir (14) by check valve ball (5) which is supported by a
spring (4) in the housing (3). The check valve is opened by outward motion of the plunger
under pressure of the expanding spring whenever a clearance occurs in the valve train.
The reservoir is kept full of oil which transmits lifting force from the body of the plunger.
The plunger and socket are selectively fitted to the body to permit a calibrated leakage so
the lifter will readjust its effective length after each cycle while the cylinder valve is closed to
return "lash" in valve train to zero. The barrel type hydraulic tappets may be removed and
replaced without complete disassembly of the engine.
1
2
3
5
12
6
9
11
7
8
10
13
14
4
15
FIGURE 20-6. HYDRAULIC TAPPET DESCRIPTION
20-4 CYLINDER ASSEMBLY INSPECTION
50 HOUR - Visually inspect cylinder to engine attaching hardware for security. Inspect
exhaust and intake flange areas for leaks. Inspect induction and exhaust tube attaching
hardware for security. Inspect rocker box cover hardware for security and safetying.
Inspect rocker cover to cylinder gasket area for evidence of oil leakage. Inspect pushrod
housings at both ends for evidence of oil leakage. Visually inspect fuel injection and
cylinder drain plumbing connections for security and evidence of leakage. Check spark
plug and ignition connections for security. Check cylinder baffling for security, cracks,
dents and wear from chafing.
Inspect the steel barrel fins for rust, pitting or any other damage. Inspect the cylinder barrel
flange and flange radius for rust and pitting. Inspect the cylinder barrel for cracks. Discard
cylinders exhibiting any of the above indications. Discard any cylinders that have been
involved in an overheating or high temperature operation event such as detonation, severe
piston scoring, or piston pin damage to the cylinder bore.
1. Body
2. Spring Plunger
3. Check Ball Retainer
4. Spring, Check Ball
5. Check Ball
6. Plunger
7.Socket
8. Ring, retaining
9. Oil groove, exterior
10. Oil inlet, body
11. Oil groove, interior
12. Oil reservoir, plunger
13. Hole, oil discharge
14. Oil reservoir, body
15. Hole, Oil Outlet