TRUCK SERVICE MANUAL
ENGINE
2. Lift cylinder block and secure to block mounting plate
Service Tools (Or Equivalent) Required
with lockwashers and capscrews.
Service
Tool
Crankshaft And Main Bearings
Tool Number
Name
1. Turn cylinder block upside-down.
ST-112
Dial Gauge Attachment
2. Using a clean rag, wipe main bearing bores and main
ST-435
Pressure Gauge
ST-487
Blow-By Checking Tool
bearing shells clean. Lay upper main bearing shells in
ST-547
Gauge Block
block. All upper main bearing shells are grooved and
ST-593
Timing Fixture
drilled for lubrication. No's. 1, 3 and 5 are alike and
ST-835
"O" Ring Loader
No's. 2, 4 and 6 are alike; No. 7 shell has oil groove off-
ST-997
Seal And Sleeve Driver
center. The wide portion of the shell is installed toward
ST-1172
Seal Mandrel
flywheel end of block. Groove on each shell for dowel
ST-1173
Seal Mandrel
ring must match with counterbore at capscrew hole on
ST-1 176
Piston Ring Compressor Sleeve
ST-1170
Injector Indicator
exhaust manifold side of block.
ST-1182
Valve Spring Spray Nozzle
3. Install main bearing ring dowels. Coat upper main
Locator
bearing shells thoroughly with clean lubricating oil.
(80 deg. Tilt Engine)
4. Lift crankshaft into position, using hooks protected
ST-1193
Rocker Lever Actuator
with
ST-1229
Liner Driver
rubber hose or a rope sling at two crank throws. Check
ST-1259
Seal Mandrel (Teflon Seal)
ST-1260
Seal Pilot (Teflon Seal)
rear counterweight of crankshaft to see if oversize thrust
rings are to be used and where installed, front or rear.
Desirable (Or Equivalent) Service Tools
Roll upper thrust rings into position, babbitt or grooved
ST-163
Engine Support Stand
ST-386
Pulley Assembly Tool
sides next to crankshaft flanges. Upper thrust rings are
ST-406
Drill Reamer Fixture
not doweled to block; lower halves are doweled to cap.
ST-548
Engine Rebuild Stand
5, Coat lower main bearing shells and crankshaft
ST-669
Torque Wrench Adapter
surface, with clean lubricating oil. Snap into place over
ST-763
Piston Ring Expander
crankshaft. 6. Install lower thrust rings, rings must be
ST-756
Engine Lifting Fixture
located over dowels in No. 7 main bearing cap.
ST-805
Block Mounting Plate
7. Install main bearing caps with numbers corresponding
ST-968
Belt Gauge
ST-1138
Belt Gauge
to those stamped on block on camshaft side of engine.
ST-1184
Cylinder Liner Hold-Down Tool
8. Lubricate main bearing capscrew threads with clean
ST-1190
Fuel Consumption
Measuring
engine lubricating oil, coat under head of capscrew and
Device
lockplates with SAE 140W gear lubricant and install
None Smoke Meter (order from
lockplates, start each capscrew; tighten alternately and
Cummins
slowly, to set caps into position.
Distributors)
9. Tighten main bearing capscrews by template method.
Standard Tools - Obtain Locally
a. Tighten main bearing capscrews to 140 to 150 ft-lbs
0-150 Inch-pound Torque Wrench
[19.4 to 20.7 kg ml .
0-250 Foot-pound Torque Wrench
0-600 Foot-pound Torque Wrench
b. Continue to tighten capscrews to 300 to 310 ft-lbs
Dial Indicator (Starret No. 196A)
[41.5 to 42.9 kg ml to "set" shells, caps and lockplates.
Dial Indicator Sleeve (Starret No. 196-
c. Loosen completely; retighten to 140 to 150 ft-lbs [19.3
L)
to 20.7 kg ml .
Manometer (Mercury or Water)
d. Tighten both capscrews on each cap alternately and
0-1 Micrometer
evenly to 300 to 310 ft-lbs [41.5 to 42.9 kg ml torque.
Impact Wrench
Note: There are two torque methods which are
Engine and/or Chassis Dynamometer
Hoist (Power or Chain)
acceptable:
Straight Edge
Template and Torque method. Refer to Groups 1 and 8.
Feeler Gauge
10. Attach dial indicator gauge securely to rear of
cylinder block with contact point of gauge resting on
ENGINE ASSEMBLY
crankshaft flange end face.
With a pry bar, pry
Mount Cylinder Block To Engine Stand
crankshaft toward front of engine. Remove pry bar and
1. Secure ST-805 Block Mounting Plate to ST-548 Engine
set gauge at "O."
Rebuild Stand. Secure water header cover plate adapter and
11. Pry crankshaft toward rear of engine. Total gauge
adapter plate to cylinder block.
reading should be 0.007 to 0.017 inch [0.18 to 0.43 mm],
with
a
new
crankshaft
and
thrust
rings.
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