Resultados de los modelos de Hulburt y Thompson
3.5.6 Moores Christopher N.K., Maul George A., Intra-Americas Sea
Perform the following steps for rocker arm assembly removal:
NOTE:
If unit is equipped with Jake Brake®, remove brake. Refer to section 1.36.2.
NOTE:
Jake Brakes are not used on the Series 60G engine.
1. If necessary, steam clean the engine around the valve rocker cover and cylinder head mating area.
NOTE:
High pressure water or steam cleaning should be avoided in the valve rocker cover/cylinder head area of the Series 60 gas. The ignition system can be affected.
2. Remove the valve rocker cover. Refer to section 1.6.2 (one-piece), refer to section 1.6.3 (two piece), and refer to section 1.6.5 (three-piece).
3. Remove the rocker arm shaft bolts (No. 2, 3, 4 or 5, 6, 7) and nuts (No. 1 or 8) that retain the rocker arm shaft assembly to the cylinder head. See Figure 1-54 for Series 60 diesel engine and see Figure 1-55 for Series 60 gas engine. For camshaft or cylinder head removal, both rocker arm shaft assemblies must be removed.
NOTE:
Whenever nuts No. 1 or 8 are loosened or removed, the torque on the corresponding rocker shaft stud must be checked. Torque to 126–146 N·m (93–108 lb·ft).
All information subject to change without notice. (Rev. 2005)
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Figure 1-54 Rocker Arm Shaft Bolts and Nut Identification Numbers
Figure 1-55 Rocker Arm Shaft Bolts and Nut Identification Numbers (Series
4. Use rocker arm and shaft assembly removal tool (J–35996-A) to remove the rocker arm shafts, with rocker arm assemblies in place. See Figure 1-56.
NOTE:
Some engines may be equipped with ceramic injector rollers. Use extra caution while removing and handling.
Figure 1-56 Rocker Arm Shaft Assembly Removal
5. Remove unitized valve adjusting screw assemblies. Then proceed to step 7.
NOTE:
If the unitized valve button separates from the screw, the button and screw must be replaced with a new Unitized Valve Adjusting Screw assembly. Do not attempt to reassemble them for reuse in engine. Unitized Valve Adjusting Screws will not be serviced separately.
NOTE:
If removing a former valve adjusting screw with valve button and retainer clip, proceed to step 6.
All information subject to change without notice. (Rev. 2005)
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6. To remove the valve button or valve button retaining clip, the valve adjusting screw must be removed from the rocker arm as follows:
NOTICE:
To avoid possible component damage, the valve button retainer MUST NOT be expanded more than 15.5 mm (0.610 in.). An adjusting screw is provided on the expander tool to limit the amount of travel.
[a] Spread the retaining clip with expander and remove the button. See Figure 1-57.
Figure 1-57 Valve Button Retainer Clip Removal
[b] Slide the retaining clip, open end first, down the adjusting screw. It is necessary to spread the clip slightly so that the open end can pass over the ball head of the adjusting screw.
[c] Insert the tips of the expander (J–36347) between the legs of the retaining clip and expand the clip.
[d] Insert the groove on the valve button into the legs of the retaining clip.
[e] Remove the expander and hold the legs of the retainer with the thumb and index finger.
[f] Press the valve button towards the screw to seat both legs of the retainer completely in the groove.
7. If further disassembly is necessary, slide the rockers off the shafts, marking or segregating the parts so that they may be reinstalled in the same position from which they were
stamped on the outboard end of each rocker shaft to ensure correct assembly and installation. See Figure 1-58.
Figure 1-58 Rocker Arm Shaft Identification Mark
All information subject to change without notice. (Rev. 2005)
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1.3.2.1 Cleaning of Rocker Arm Assemblies
Clean the rocker arm assemblies as follows:1. Remove the cup plug at one end of the rocker arm shafts to facilitate the removal of any foreign material lodged behind the plug.
NOTICE:
Do not soak the rocker arms in solvent because this will remove the lubricant from the cam follower roller bushings.
2. Clean the exterior of the rocker arms only.
EYE INJURY
To avoid injury from flying debris when using compressed air, wear adequate eye protection (face shield or safety goggles) and do not exceed 276 kPa (40 psi) air pressure.
3. Blow dry with compressed air.
4. Soak the rocker shaft in clean fuel oil.
5. Run a wire brush through the oil passage to remove any foreign material or sludge.
6. Clean the exterior of the shaft and blow out the passages and oil holes; and dry with compressed air.
1.3.2.2 Inspection of Rocker Arm Assemblies and Camshaft Lobes
Prior to inspection:1. Install new cup plugs with installer tool (J–36326) until they are 1.0-1.3 mm (0.040-0.050 in.) below the surface of the shaft. See Figure 1-59.
Figure 1-59 Rocker Arm Shaft Identification Mark
2. Remove all of the old gasket sealer from the joint face of the Number 1 and Number 7 camshaft bearing caps and the cylinder head. Refer to "Gasket Eliminator Removal" in the
"General Information" section.
All information subject to change without notice. (Rev. 2005)
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Inspect the rocker arm assemblies and camshaft lobes as follows:
1. Inspect the rocker arm shaft bushing surfaces and rocker arm bushing bores.
[a] Check the rocker arm shaft bushing surfaces and rocker arm bushing bores for wear or scoring. If damage was found, replace component.
[b] If no damage was found, reuse component.
2. Inspect the cam follower rollers.
[a] Check the cam follower rollers for scoring, pitting, or flat spots. If damage was found, replace the component.
[b] If no damage was found, reuse component.
3. Check the cam follower rollers to ensure they turn freely on the roller pins.
[a] Clearance between the rollers and pins should not be more than 0.08 mm (0.003 in.).
[b] Replace as necessary.
4. Inspect the camshaft lobes and journals.
[a] Check the camshaft lobes and journals for scoring, pitting, or flat spots. If damage was found, replace the component.
[b] If there is doubt as to the acceptability of the camshaft for further service, determine the extent of camshaft lobe wear. Refer to section 1.28.3.1.
5. Inspect the valve adjusting screw assemblies.
[a] If former style valve adjusting screw assembly is damaged; replace with new unitized valve adjusting screw assembly.
NOTE:
Replace with unitized valve adjusting screw assembly of the correct position.
[b] If any damage is found on the unitized valve adjusting screw assembly; replace with new unitized screw assembly.
[c] If no damage is found on the former style valve adjusting screw or on the new unitized valve adjusting screw assembly; reuse the components.
NOTE:
Former style valve adjusting screw assemblies and the unitized valve adjusting screw assemblies are interchangeable and can be mixed in the same engine.