Specifications Information and Repair Parts Manual
316F-95 and 316F-99
316F-251-00
2
10/2016
2-Inch Self-Priming Dredging Pump
1.
Disassemble
pump
for
access
as
described
in
MECHANICAL SEAL REPLACEMENT, steps 1,2 and 3.
2.
Replace parts as necessary.
NOTE:
When replacing volute, impeller or wearplate, make sure
flapper valve (Ref. No. 12) has been installed and is positioned
correctly on volute.
NOTE:
Before installing new parts, clean all mating surfaces
thoroughly.
BEARING HOUSING SERVICE FOR MODEL 316F-99
1.
Remove front pump assembly as described under
Mechanical Seal Replacement (Steps 1, 2 & 3).
2.
Disassemble bearing housing (Ref. No. 33) from pump
adapter (Ref. No. 3) by removing fasteners (Ref. Nos. 31,
32, and 34).
3.
Remove shaft bearing (Ref. No. 35) and shaft (Ref. No. 36)
as an assembly by first removing snap ring (Ref. No. 39).
Push shaft bearing assembly out of bearing housing by
rapping on threaded end of shaft with a soft mallet or block
of wood and a hammer.
4.
Ball bearings can now be removed from shaft.
5.
If shaft bearings have been removed from shaft, replace by
sliding bearing on shaft to shoulder. Replace shaft bearing
assembly by sliding assembly into housing threaded end
first. Push shaft bearing assembly completely in by gently
tapping on keyway end of shaft with a soft mallet. Replace
snap ring.
6.
Reverse steps 1 thru 3 to reassemble pump.
IMPORTANT:
After pump is assembled, it is necessary to rotate pump
shaft by hand to check for striking of impeller. If striking or rubbing
occurs, adjust impeller shims as required (See Shim Adjustment).
SHIM ADJUSTMENT
1.
When installing a replacement impeller (Ref. No. 10), engine
(Ref. No. 1), bearing assembly (Ref. Nos. 33, 35, 36, 38, 39),
shaft sleeve (Ref. No. 8), adapter (Ref. No. 3) or volute (Ref.
No. 11) it may be necessary to vary number of impeller shims
(Ref. No. 9) that will be required. This is easily done by
adding one 0.010" shim more than was removed and
reassembling pump as described in MECHANICAL SEAL
REPLACEMENT section.
NOTE:
When adding or removing shims, it is best to proceed with a
0.010" increment each time. Remove spark plug or disconnect and
ground spark plug wire, where applicable. While tightening fasteners
(Ref. No. 16) turn shaft by hand and feel for shaft seizing. If shaft begins
to seize before fasteners are completely tight, disassemble pump and
remove one shim and repeat assembly.
2.
Once having added one shim more than original, ensure that
volute and adapter are firmly fitted (check fasteners). When
shaft turns freely add shims until it does strike then remove a
0.010" shim. This should allow proper clearance.
3.
Proper running clearance for impeller should be as close as
possible to volute without striking; maximum clearance is
1/32" (0.032").
4.
Follow above procedure until proper clearance is obtained.
This will ensure maximum performance.
IMPELLER, VOLUTE, AND WEARPLATE
REPLACEMENT
Impeller (Ref. No. 10), volute (Ref. No. 11) and rear wearplate (Ref. No.
4) are subject to wear by abrasive sand or sediment laden liquids. If
badly worn, all these parts can be replaced easily and pump thus
restored to full efficiency.
NOTE:
When clearance between impeller and volute exceeds 1/16" at
face of impeller or 1/8" on outside diameter of impeller, it may be
necessary to take corrective action. The increased clearance can cause
lengthened priming and decreased capacity to your unit. If performance
is satisfactory for your application, it is recommended that no corrective
maintenance be performed regardless of what clearances may have
developed on your unit. This is because increased clearances in
themselves are not generally harmful to your pump. Normally, new
pump clearances can be restored by simply shimming behind impeller.
(Add shims Ref. No. 9). If impeller is badly worn it is recommended that
impeller and volute be replaced. This is usually all that is required since
only on unusually abrasive materials will wearplate show deterioration.
In these cases, follow instruction below for replacement and refer to
Figure 2.
