Inspection - Tennant ATLV 4300 Service Manual

Series 26 - Model 26000 Single Gear Pumps

Inspection

Inspect Parts for Wear
General
1 Clean and dry all parts.
2 Remove all nicks and burrs from all parts with emery
cloth.
Gear Assembly Inspection
1 Check spline drive shaft for twisted or broken teeth or
check keyed drive shaft for broken or chipped keyway.
2 Inspect both the drive gear and idler gear shafts at
bushing points and seal area for rough surfaces and excessive
wear.
3 Replace gear assembly if shaft measures less than 19 mm
[ .748 in] in bushing area. (One gear assembly may be replaced
separately; shafts and gears are available as assemblies only.)
4 Inspect gear for scoring and excessive wear.
5 Replace gear assembly if gear width is below the following
dimensions. Refer to chart on this page.
6 Assure that snap rings are in grooves on either side of
drive and idler gears.
7 If edge of gear teeth are sharp, break edge with emery
cloth.
Model Number 26001 26002
Pump Disp. 6,6 8,2
cm 3 /r [in 3 /r] [.40] [.50]
Gear Width 7,85 9,75
mm [in] [.309] [.384]
26003 26004 26005
9,5 10,8 13,8
[.58] [.66] [.84]
11,20 12,95 16,15
[.441] [.510] [.636]
Front plate and Backplate Inspection
1 Oil groove in bushings in front plate should be in line with
dowel pin holes and 180° apart. The oil grooves in the
backplate bushings should be at approximately 37° to the
pressure side.
2 Replace the backplate or front plate if I.D. of bushings
exceed 19,2 mm [.755 in] (Bushings are not available as
separate items).
3 Bushings in front plate should be at 3,20 mm [.126 in]
above surface of front plate.
4 Check for scoring on face of backplate. Replace if wear
exceeds ,038 mm [.0015 in.].
Body Inspection
1 Check body inside gear pockets for excessive scoring or
wear.
2 Replace body if I.D. of gear pockets exceeds 43,7 mm
[1.719 in].
26006 26007 26008
16,7 19,7 22,5
[1.02] [1.20] [1.37]
19,35 22,56 25,76
[.762] [.888] [1.014] [1.107]
8
26009 26010 26011
24,3 25,2 27,7
[1.48] [1.54] [1.69]
28,12 28,96 32,16
[1.140] [1.266] [1.330]
26012 26013
29,0 30,6
[1.77] [1.87]
33,78 35,36
[1.392]