37D1129 and HKJ53 ROCKER COVER.  Leyland and Marshall Rocker cover

First fitted to Leyland 344, 384, 255 and 270 tractors up to the introduction of the Q Cab tractors which have a small 2″ inch diameter oil filler hole in the rocker cover.  Later, the Leyland Harvest Gold range were again fitted with a larger holed rocker cover.

37D1129 Rocker Cover has a large 3″ inch diameter oil filler hole to take the large oil filler cap AEB172 CAP and has 8 small screw holes to take
Small Rocker Cover Screws.

HKJ53 Rocker Cover also has a large 3″ inch diameter oil filler hole to take the large oil filler cap AEB172 CAP and has 8 large screw holes to take
Large Rocker Cover Screws.  It is considered that this cover seals better.

See part numbered 1 in the diagram.

Used on engines:

BMC 3.4TD 4 cylinder diesel
BMC 3.8TD 4 cylinder diesel
Leyland 4/98DT, 4/98NT, 4/98TT 4 cylinder diesel

Fitted to tractors:

• Leyland 344 – 384 – 255 – 270
• Leyland 602 – 604 – 702 – 704 – 802 – 804
• Marshall 602 – 604 – 702 – 704 – 802 – 804 – 902XL – 904XL

Note: These rocker covers are interchangable with the assosiated screws.