section 10 chapter 11 - login required valve, 8.3 liter engine cam followers/tappets page a...

Section 10 Chapter 11

7-89400NH

24 Valve, 8.3 Liter Engine

Cam Followers/Tappets

Note: All coding used in the 8.3 Liter and 9 Liter engine manuals are Cummins engine codes. These engine codes have no meaning to New Holland warranty codes and should only be used for procedure

steps.

24 Valve, 8.3 Liter EngineCam Followers/Tappets Page a

7-89400NH Section 10 Chapter 11 Issued 8-2001

Cam Followers/Tappets

ContentsPush Rods or Tubes (004-014) ..................................................................................................................................................1

Clean (004-014-006) .....................................................................................................................................................1Inspect for Reuse (004-014-007) ..................................................................................................................................1Install (004-014-026) .....................................................................................................................................................2Preparatory (004-014-000) ............................................................................................................................................1Remove (004-014-002) .................................................................................................................................................1

Tappet (004-015) ..........................................................................................................................................................................3Inspect for Reuse (004-015-007) ..................................................................................................................................5Install (004-015-026) .....................................................................................................................................................6Preparatory (004-015-000) ............................................................................................................................................3Remove (004-015-002) .................................................................................................................................................3

24 Valve, 8.3 Liter EnginePage b Cam Followers/Tappets


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24 Valve, 8.3 Liter Engine Push Rods or Tubes (004-014)Cam Followers/Tappets Page 1


Push Rods or Tubes (004-014)

Preparatory (004-014-000)

Remove the rocker lever cover. Refer to Procedure 003-011.

Remove the rocker levers. Refer to Procedure 003-008.

Remove (004-014-002)

Mark the push tubes to identify their location.

Remove the push tubes.

Clean (004-014-006)

Clean the push tubes in hot soapy water.

Dry with compressed air.

Inspect for Reuse (004-014-007)

Inspect the push tube ball and socket for signs of scoring. Check forcracks where the ball and the socket are welded into the tube.

Push Rods or Tubes (004-014) 24 Valve, 8.3 Liter EnginePage 2 Cam Followers/Tappets


Check the push tubes for straightness.

Push tubes must be straight, with no curve.

Install (004-014-026)

Install push tubes in their original location.

Install the push tubes into the sockets of the valve tappets.

Lubricate the push tube sockets with clean 15W-40 engine oil.

10 mm

Install the crossheads and rocker levers. Refer to Procedure 003-008.

Torque Value: 60 N•m [44 ft-lb]

Adjust the valve lash. Refer to Procedure 003-004.

24 Valve, 8.3 Liter Engine Tappet (004-015)Cam Followers/Tappets Page 3


15 mm

Install gasket and rocker lever cover. Refer to Procedure 003-011.

Torque Value: 12 N•m [9 ft-lb]

Operate engine and check for leaks.

Tappet (004-015)

Preparatory (004-015-000)

• Remove the rocker lever cover. Refer to Procedure 003-011. • Remove the rocker levers. Refer to Procedure 003-008. • Remove the push tubes. Refer to Procedure 004-014. • Remove the vibration damper. Refer to Procedure 001-050. • Remove the gear cover. Refer to Procedure 001-031. • Remove the camshaft. Refer to Procedure 001-008.

Remove (004-015-002)

Insert the trough to the full length of the cam bore.

Tappet (004-015) 24 Valve, 8.3 Liter EnginePage 4 Cam Followers/Tappets


Make sure the trough is positioned so it will catch the tappet when thewooden dowel is removed.

Only remove one tappet at time. Remove the rubber band from the twocompanion tappets, securing the tappet not to be removed with therubber band.

Pull the wooden dowel from the tappet bore allowing the tappet to fallinto the trough.

When the tappet is dropped into the trough, most of the time it will fallover. However, if it doesn't, gently shake the trough just enough to allowthe tappet to fall over before removing.



When removing the No. 6 cylinder tappets, special care should be tak-en not to knock or shake the tappet over the end of the trough.

Carefully pull the trough and tappet from the cam bore and remove thetappet. Repeat the process until all tappets are removed.

Inspect for Reuse (004-015-007)

Inspect the socket, stem, and face for excessive wear, cracks, and oth-er damage.

Pit marks on the tappet face are acceptable.

The following criteria defines the size of the pits allowed.

1. A single pit can not be greater than 2 mm [0.078 inch].2. Interconnection of pits is not allowed.3. Total pits when added together should not exceed 6 mm [0.236

inch] diameter or a total of 4 percent of the tappet face. 4. No pitting is allowed on the edges of the wear face of the tappet.

Visual Limits(A) - Normal Contact (exaggerated)(B) and (C) - Irregular Contact: Do not reuse.



Measure the valve tappet stem.

Install (004-015-026)

Insert the trough the full length of the cam bore.

Lower the tappet installation tool down the push tube hole, through thetappet bore, and into the trough.

Feed the installation tool through the cam bores by carefully pulling theplastic trough/installation tool out the front. The barrier at the rear of thetrough will pull the tool out most of the time.

Valve Tappet Stem Diametermm in

15.936 MIN 0.62715.977 MAX 0.629



Lubricate the tappets with Lubriplate™ 105, or equivalent.

Insert the installation tool into the tappet.

To aid in removing the installation tool after the tappet is installed, workthe tool in and out of the tappet several times before installing the tap-pets.

Slide the trough into the cam bore.

Pull the tool and tappet through the cam bore and up into the tappetbore.



If difficulty is experienced in getting the tappet to make the bend fromthe trough up to the tappet bore, pull the trough out enough to allow thetappet to drop down and align itself, then pull the tappet up into thebore.

After the tappet has been pulled up into position, slide the trough backinto the cam bore and rotate it one-half turn. This will position the roundside of the trough up, which will hold the tappet in place.

Remove the installation tool from the tappet.

Install a wooden dowel into the top of the tappet. Wrap rubber bandsaround the wooden dowels to secure the tappets.

Repeat this process until all tappets have been installed.



Complete the installation of the removed parts and adjustments as re-quired.

• Install the camshaft. Refer to Procedure 001-008. • Install the gear cover. Refer to Procedure 001-031. • Install the vibration damper. Refer to Procedure 001-050. • Install the push tubes. Refer to Procedure 004-014. • Install the rocker levers. Refer to Procedure 003-008. • Adjust the valves. Refer to Procedure 003-004. • Install the rocker lever cover. Refer to Procedure 003-008.

Operate the engine and check for leaks.

section 10 chapter 11 - login required valve, 8.3 liter engine cam followers/tappets page a...

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