Check Valve Rotation.indd

Diesel Customer Information No. 289
Action Code:
When Convenient
Backround
Check of Valve Rotation
Many years of experience with the engines in operation
has resulted in a positive development in relation to the
maintenance work for checking the valve rotation of inlet
valves.
Changes in maintenance
schedule
The valve rotating devices used by MAN Diesel have
proven to be reliable and resistant to failure over their
service life of 24,000 hours.
Concerns
This has enabled the maintenance work for checking
the valve rotation of inlet valves to be simplified, greatly
reducing maintenance effort.
Summary
There is no need for the regular checks of valve rotation at
1,500 operating hours on the medium-speed four-stroke
engines in operation as per the engine type list opposite.
Filing Advice
DCI / 289 - March 2010
Four-stroke engines 32/40, 32/44CR,
40/54, 48/60, 51/60DF, 58/64
Improvement of maintenance work on valve
rotation device.
Assembly group/work card 113/114
Measures
In future, the valve rotation will only be checked on these
engines in the following cases:
•
Following disassembly/reassembly of the valve rotating
device
• After carrying out maintenance work or repairs on the
cylinder head
Work Sequence
The recommended work steps have also been changed.
The valve rotation check will now no longer be carried out
during operation with the valve cover open.
MAN Diesel SE
Head office (& postal address)
PrimeServ
After Sales Augsburg
PrimeServ
After Sales Technical
PrimeServ
After Sales Commercial
Stadtbachstraße 1
86153 Augsburg
Germany
Phone: +49 (0) 821 322 0
Fax:
+49 (0) 821 322 3382
[email protected]
www.mandiesel.com
Stadtbachstraße 1
86153 Augsburg
Germany
Phone: +49 (0) 821 322 3509
Fax:
+49 (0) 821 322 1530
[email protected]
Stadtbachstraße 1
86153 Augsburg
Germany
Phone: +49 (0) 821 322 1499
(24-h-hotline)
Fax:
+49 (0) 821 322 3838
[email protected]
Stadtbachstraße 1
86153 Augsburg
Germany
Phone: +49 (0) 821 322 1799
(24-h-hotline)
Fax:
+49 (0) 821 322 3574
[email protected]
MAN Diesel – a member of the MAN Group
DCI / No. 289 - March 2010
New Procedure
1. Preparation
Switch off the engine. Remove the cylinder head cover.
2. Colour marking
Make markings on the valve rotating devices and axial bearings.
3. Operation
Replace and secure the cylinder head cover. Start the engine and allow it to run for one minute at a
nominal speed with 25 % to 30 % power.
4. Check
Switch off the engine and remove the cylinder head cover. Check the markings. If the valve rotating
devices are working correctly, the markings will now be in a different position.
An exact description of the individual work steps can be found on the enclosed work card.
Important Note
It must be ensured that during the checking of the valve rotating devices, the engine cannot be started.
Contact
Should you have any queries, our Technical Service will be pleased to be of assistance:
MAN Diesel SE
86224 Augsburg
Tel.: +49 (0) 821 322-1401
Fax: +49 (0) 821 322-3838
E-mail: [email protected]
Robert Glauber
Senior Vice President
After Sales
Jörn Holst
Senior Manager
After Sales Technical
Please forward this information to your technical operational personnel and
remember to inform us of the current operating hours of your MAN Diesel engines.
Diesel Customer Information »Check of Valve Rotation« - Page 2 of 2