e. Operating Valve Reassembly and Installation.
(1)
Use a new packing ring (2) and install it on the valve block. Push the packing ring (2) with fingers until it is
seated properly in its mounting groove on the valve block (5). Be careful not to twist or break the packing
ring during the installation.
(2)
Coat the valve plunger (3) with hydraulic oil and install it in the valve block (5).
(3)
Install the valve spring (6) in the valve block (5). Make sure that the valve spring (6) bottoms properly in
the valve plunger hole.
(4)
Install the valve bonnet (1) on the valve block and see that the mounting holes in the bonnet and valve
block (5) are properly alined. Install and tighten the valve bonnet (1) mounting screws and lockwashers.
(5)
Position the spring adjusting screw (7) over the valve spring (6) and turn it clockwise to install it into the
valve bonnet (1).
(6)
Install the locknut (9) on the spring adjusting screw (7).
(7)
Install the spring cover (10).
(8)
Install the mounting spacers on the operating valve mounting studs.
(9)
Install the operating valve and tighten the mounting lockwashers and nuts.
(10) Connect the hydraulic lines with the valve and tighten the connections securely. Remove the tags from
the hydraulic lines.
(11) Fill the hydraulic system and adjust the regulator valve (b above). Check the operating valve for leaks and
proper operation.
Section XVI. FRAME ASSEMBLY
156. Description
The main frame of the road roller is of all-welded construction, made of heavy structural channel (6, 8, and 10) and
plate (1) members, secured by cross-members (7). The frame is reinforced by a floor plate welded under the entire
engine and transmission compartments. A removable cover plate for access to the oil pan from the underside of the roller
is bolted or in some instances tack welded to the bottom cover plate. The side plates (1) are cut to arch over the steering
roll yoke, with an upper and lower cross plate welded in place to hold the king pin bearing seats. A towing connecting (9)
is welded to the front channel (8) at the compression roll end of the roller. The compression roll housing is of welded
construction with a built-in sprinkler tank.
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