HALE AP, Technical Manual

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No matter which group requires maintenance, the Hale Flex Series single stage booster pump
design allows two methods of pump maintenance. In the first method (and the preferred method
when only pump components require removal and replacement) the maintainer may be able to
repair the pump without removing the pump and gearbox from the apparatus. Even though the
Hale pump design allows the pump component to be removed without removing the pump and
gearbox, the apparatus installation may prevent pump component removal without first removing
the pump and gearbox. This is due to limited pump access when the pump is installed on the
apparatus (as the pump is typically located between the frame rails and under other apparatus
components). Therefore use of this method depends on the apparatus configuration (pump ac-
cess). If the apparatus configuration allows pump component ONLY removal, see the appropri-
ately titled subparagraph for the pump component that requires R&R.
If the gearbox requires internal component replacement or the apparatus configuration does
NOT allow pump access the maintenance method requires the pump and gearbox be removed
from apparatus as one assembly. If the apparatus configuration does NOT allow pump compo-
nent ONLY removal or if the gearbox requires repair, see paragraph 5.8.2.1, General Pump Re-
moval From The Apparatus for generalized removal instructions.
No matter which method of removal is utilized; Figure 20 provides an exploded view of the AP
pump, Figure 21 provides an exploded view of the CBP pump, and Figure 22 provides an explod-
ed view of the MBP pump, and Figure 23 provides an exploded view of the RSD pump to support
Level 1 maintenance procedures. Figure 24 and Figure 25 provide exploded views of the gearbox
(based on gear ratio) for support of Level 2 and/or 3 maintenance procedures. Impeller renew
and miscellaneous maintenance procedures require the combination of both the applicable
pump and applicable gearbox figures to provide adequate support. Note: Figure 25 additionally
shows the optional gearbox cooling components, which (in addition to the gearbox cover) must
be removed to replace the drive gear. The gearbox cover and the optional cooling tube must also
be removed to replace some, pump gears. Removal is required for pumps with 1.14, 1.31, 1.64,
and 1.90:1 gear ratios as the pump gear is too large to exit via the gearbox bearing bores.
Under any circumstances, do NOT remove a pump as an assembly (the entire unassembled
pump) from the gearbox. Doing so leaves the pump shaft unsupported and allows significant
damage to the internal pump components. Removing the pump as an entire assembly may result
in catastrophic damage to the clearance rings, impeller, and the mechanical seal.
Regardless of the maintenance level, read and understand all the instructions before beginning
any pump and especially a gearbox repair.