CleaverBrooks CBEX Elite, Operation And Maintenance

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Inspection and Maintenance
8-18 750-368
CBEX Elite 100-1200 HP
7.
SINGLE-POINT SYSTEMS
:
Remove the capscrews holding the jackshaft support bracket so that the bracket can be
moved. It may also be necessary to loosen the supporting bracket on the far end of the shaft.
8.
Remove the existing packing and guides. Do not re-use the packing and guides.
9.
Lightly coat the stem with the lubricant provided with the packing kit. Place the new packing, o-rings, and
guides onto the stem in the sequence shown. The beveled face of the guides and the teflon rings must face
upward, with the exception of the upper brass guide which is faced down. Be sure that the o-rings are prop-
erly located.
10.
Using the stem as a guide, insert the assembled packing into the cavity, then withdraw the stem.
11.
In the event the packing is too high, remove one teflon packing from each side of the middle brass guide as
needed.
12.
Under no circumstances eliminate the two teflon packings on only one side of the brass guide.
13.
Replace the gasket, put the support in place, and secure all fastenings.
14.
Replace the metering stem and spring. Lightly lubricate the stem to facilitate insertion and easy movement.
Use care when inserting so that the orifice and the stem are not damaged.
FIGURE 8-16.
Fuel Stem Packing, Cross-Section
15.
Snug the packing gland, but only sufficiently to place slight tension on the packing. The stem must move
freely from the force of the spring.
16.
Work the stem up and down several times to ensure that it moves freely.