Service and repair
Puritan Bennett™ 700 Series Ventilator System Service Manual
10070389 Rev. A
8-59
8.12.3 Greasing rack
(See Figure 8-46). Grease the rack every 15,000 hours and every time you install a new piston/
cylinder assembly; rack grease is part of the 15,000- and 30,000-hour preventive maintenance
kits.
The rack can be greased with or without the piston/cylinder assembly removed from the
ventilator. Figure 8-46 shows the piston/cylinder assembly removed. Before greasing rack,
manipulate piston so rack is in its fully extended position. Use a clean, lint-free cloth to
remove surface grease, if applicable. Inspect the rack and pinion for wear, chips, or breakage.
Brush grease onto the rack teeth evenly over the length of the rack. Push piston back and
forth to evenly distribute grease. Wipe off excess grease.
Caution
Make sure there is no grease on the optoswitches and rack flag. Grease on the
optoswitches in particular can cause the ventilator to malfunction.
Figure 8-46. Greasing rack
7-00206
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