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5.9
Install the Drain Kit
The drain kit is intended to protect the interior of a vehicle from damage due to water drainage,
and is optional for externally mounted masts. However, the elbow from the kit may be used to
shield the drain hole from blowing sand, dust, and other debris.
Keeping water out of the mast is very important to avoid potential delays in operations and
damage to the mast. Water can enter the mast through condensation in the air supply, or by rain
running down the tubes and entering at the collars. Water that freezes in the mast can cause the
mast to work erratically, or not at all.
The drain hole on the base tube and weep holes on the intermediate tubes are located to
facilitate the drainage of water during periods of extension. The drain kit is designed to route
water from inside the mast to outside of the vehicle or enclosure. The drain kit is intended to
protect the interior of a vehicle or other water sensitive area from damage due to water drainage.
Drain kit installation is not required for externally mounted masts.
A drain cock, provided in the hardware bag, should also be connected to the air inlet near the
base of the mast and located at the lowest point. The drain cock shall be opened when the mast
is not in use, or when a locking mast is deployed and depressurized, to empty water that may
accumulate inside the base tube, particularly after the mast has been exposed to rain. Installation
of the drain cock is described as part of installation of the pneumatic system (5.8).
To install the drain kit:
1. Be certain the locknut and washer are threaded over the end of the ¼ inch (6.35 mm) hose
adaptor (Figure 5-28).
From Mast
¼ inch
Hose
Adaptor
TP-5580101-A
FEBRUARY 2022
PNEUMATIC MAST WITH REMOTE LOCKING SYSTEM
Washer
8 feet (2.4 m) Clear
Polyethylene Tube
Lock Nut
Figure 5-28 Drain Kit (P/N: 902982)
OPERATING INSTRUCTIONS
¼ inch (6.35 mm)
Bulkhead Fitting
PAGE 119 OF 164
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