Underhill Tracker T-400 Operating instructions

T-400 Portable Irrigation
Machine
Maintenance & Repair Manual

A. Inspection of external leakage
1. Deep - groove ball bearing and rotary shaft lip seal on turbine shaft
1.1 Leakage on relief well
In case there is a recognisable leakage on the relief well or in the turbine housing, it must be
looked for the reason of the malfunction in the rotary shaft lip seal. In the majority of cases as
consequence of the leakage, the deep-groove ball bearing in the turbine housing and partial
the deep-groove ball bearing in the gear wheel is damaged (please check leakage monthly).
1.2 Radial tolerance on turbine shaft
In case it appears a radial clearance on the turbine shaft (that can be determined on the
turbine wheel if the turbine cover is screwed off) the cause is always a defect deep-groove ball
bearing in the turbine housing (Examination twice a year).
Relief Well

2. Repair of turbine bearing and rotary shaft lip seal
In case it appears such a problem on your Tracker, the repair has do be done in the
accomplish manner.
 Dismantle bonnet (BTV784337), gearbox cover (BTV784342) and plastic wheel (ZK3794434,
screw axle BTC584383 and hub cover ZK3794435) completely.
 Dismantle tripping arm (BTR684344)
 Screw off cover for turbine (BTV784310)
Tripping
arm

 Adhere turbine wheel (BTV784312) with the left hand and remove screw for turbine shaft
turbine shaft (BTC484330) M10 from turbine shaft.
 Beat back clamping sleeve (ZD1593196) with punch drift 4mm (standard tool).
 Pull out turbine wheel (BTV784312) with turbine shaft (BTC484330).
 Pull out sliding bush short (BTC484389) with pliers.
 Take out gear and spacer ring off gear case.
Screw for turbine shaft BTA484370
Turbine shaft BTC484330
Clamping sleeve ZD1593196
Turbine wheel BTV784312

 Beat out shaft seal packing (ZK0994377) together with guide bush for turbine shaft
(BTC584388).
 In case grooved ball bearing (ZK1994372) is still complete:
drive out with help of pressure bolt No.1 (BTC584431) to gear case.
 In case deep grooved ball bearing (ZK1994372) is broken (individual parts):
Apply internal extractor Ø
Ø
Ø
Ø19-24 and strike through with help of pressure bolt No.1
(BTC584431) towards gear case.
 Check whether turbine housing is OK, otherwise it should be replaced by:
1 piece Turbine housing BTP684311
4 pieces O-ring ZK1816551
4 pieces Countersunk screw ZD0493195
Ball bearing remover ZB1198227
Outer ring ZK1994372
Pressure bolt 1 BTC584431

 Set up housing edgewise and inferior
 Press in new grooved ball bearing (ZK1994372) with pressure bolt no. 2 (BTC584432)
 Insert new guide bush for turbine shaft (BTC584388) with pressure bolt no. 1 (BTC584431)
 Insert new shaft seal packing (ZK0994377) with pressure bolt no. 3 (BTC584433) – opening
has to be visual outside

 Lubricate rotary shaft lip seal with acid free grease.
 Check the assembled ball bearings on zero clearance and ease of movement in the gears
and the cover turbine shaft, if necessary replace it by a new grooved ball bearing
(ZK1994372).
Grooved ball bearing ZK1994372
Grooved ball bearing ZK1994372

 Insert and respect the right position of turbine shaft and turbine wheel with sliding bushing
(BTC484389)
Bead than following pieces on turbine shaft:
 Spacer bushing 1 (BTC584317)
 Gear 2 (BTV784347)
 Spacer bushing 2 (BTC584318)
 Gear 2 (BTV784347)
 Spacer bushing 2 (BTC584318)
 Gear 1 (BTV784346)
 Spacer (BTC584372)
Chamfer
Spacer BTC584372
Gear 1 BTV784346
Spacer bushing 2 BTC584318
Gear 2 BTV784347
Turbine shaft BTC484330
Spacer bushing 2 BTC584318
Gear 2 BTV784347
Spacer bushing 1 BTC584317
Sliding bush BTC484389
Turbine wheel BTV784312