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P:\kessler\PCI_RS907L_GB.doc Page: 1/7 - 05-09-08

Figure 2: The area around the hopper on the 16HLS concrete pump Cover in the new design

Group: 07 Hopper unit

KS 912256

NP 10689 Author Dipl.-Ing.M.Fritz

Written in accordance with Porga 970806

Confidential. For Putzmeister internal use only

Date revised 00-01/05

Table of contents

1. Description The first section describes the basic features of the hopper. The second section describes the hopper models and associated assemblies available.

1.1 Development objectives This hopper model was developed with the aim of facilitating access to the hopper region and handling during servicing, such as to facilitate the replacement of wear parts in the hopper, for example. A previous weakness on our machines was the relatively limited space between the loading hopper and the truck. This was previously a focal point for criticism of our machines and was considered to be placing us at a disadvantage in relation to our competitors. By introducing an easy-to-assemble system, it has been possible to reduce the time and costs of servicing and when replacing components in the hopper such as S transfer tubes or wear parts. In addition, it was also possible to reduce the weight of the concrete pump by introducing plastics as a manufacturing material.

1.2 Features Figure 2 shows a 16 HLS pump by way of example. A general feature of this RS907 L hopper series is the S2318 S transfer tube with its larger intake diameter in relation to the S2018 S transfer tube and the general introduction of the 90 mm diameter S transfer tube bearing.

RS 907 L hopper

Figure 1: Hopper


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For the bearing, this means a reduced specific load on the teeth and in the bearing housing. The result is a longer service life.

1.3 Overview of the variants The RS907L hopper is manufactured from one base part for three different connection diameters. Figure 3 shows the manufacturing structure with a planning stage and scheduling stage. The subcontractor takes the planned or base hopper and prepares it according to its later use, welding on the crossbeam for the various delivery cylinders, for example.

Figure 3: Manufacturing and scheduling structure for the various hopper applications

Planning stage for materials

Purchasing stage


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1.4 Current further developments In the future, a conical S transfer tube shaft bearing will be introduced for this hopper. This bearing is already in use by Putzmeister Systems Engineering. Furthermore, the hopper extension is produced by injection moulding PUR material into which the cradle supports for the grille are made. This will then mean that the two steel round rods in the hopper are no longer necessary. See figure 4.

Figure 4: Grille with plastic and steel tube as grille support

2. Features and function description The plastic and rubber material components on the machine are kept black, as can be seen in figure 5. They match the different paint finishes of the vehicles. The rubber collar, hopper extension and also the water tank with its side-mounted lance holders are the components referred to here.

Figure 5: Assembled and painted machine

Hopper cover in new design Plastic water tank Plastic hopper extension Rubber collars


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2.1 Common basic features of the RS 907 L hopper series

Figure 6: Hopper unit A hopper unit is composed of the following subgroups: a. Basic hopper b. S transfer tube with bearing and set of wear parts c. Grille, optionally with vibrator d. Spray guard with folding lid and removable extension e. Hinged elbow or pressure connection f. Agitator g. S transfer tube switchover h. Steps can be supplied as an option

The hopper is divided: the extension is removable: See function description.

The grille is made from wear-resistant steel. It is mounted externally and therefore away from the concrete. The long-requested integrated vibrator cabling was also added at this point.


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2.2 Function description The following describes the method of operation for the RS907L hopper and the procedure for dismantling the hopper extension. The hopper extension is made of plastic, and sits on the steel hopper and is then screwed down.

The six screws on the sides and at the rear must be loosened. The connecting bolt for the extension hopper rubber collar must also be removed. The hopper extension can now be removed. Since the weight of this spray guard unit is m = 35 kg, it may only be removed with one person on the left and another on the right-hand side. When subsequently assembling the hopper, it must be ensured that the seal cord and also the flange face are free from dirt or concrete residue in order to achieve a flawless seal. The seal cord must be greased. Figure 7: The RS907L hopper

Figure 8: Removing the hopper extension complete with lid

The hopper extension is removed. Folding up the grille as normal produces a larger opening than before, and it is through this larger opening that the access to the switch lever and bearing region, for example, is significantly improved. Figure 9: Hopper with the hopper extension removed

Schrauben lsen

undo screws


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3. Hopper applications and modular system

3.1 Hopper applications and modules

Figure 11: Hopper unit module

Hopper extension with the option of plastic or steel

Outlet on hopper with 230 diameter delivery cylinder: up to p=130 bar with

pressure connection up to p=85 bar with

hinged elbow

Hopper variants: for 230 diameter versions (a BSF 16H pump) for 250 diameter versions (a BSF 11/16HLS pump) for 280 diameter versions (a BSF 20H pump) Delivery cylinder

Outlet on hopper with 250 diameter delivery cylinder: up to maximum p=85

bar and only with hinged elbow

Set of wear parts Available in qualities DURO 22 or hard metal

S transfer tube: Option of S2318L or S2318V with clamped shaft. Always with 90 series shaft

Outlet on hopper with 280 diameter delivery cylinder: up to maximum p=85

bar and only with hinged elbow

S transfer tube: switch cylinder with 160mm stroke and 60mm diameter or 80mm diameter possible.

Conventional aluminium cover

New plastic cover option

Spray guard

Core pump


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3.2 Hopper comparison for 16H LS/16H concrete pump 230 diameter delivery cylinders

RS907L RS905A Average gross weight 930 kg Average gross weight 870 kg Installable S2318 S transfer tube Installable S2018 S transfer tube Further applications for S2015D with hinged or

pivoting elbow

Figure 12: Table of hopper comparisons

3.3 Delivery cylinder - intermediate ring transition The sectional views for the RS907L and RS905A hoppers illustrate the tapering and interchangeability of the intermediate rings. RS907L hoppers with 230 mm diameter delivery cylinders

RS907L hoppers with 250 and 280 mm diameter delivery cylinders

RS905A hoppers with 230 mm diameter delivery cylinders

Fitting and removal of the intermediate rings from inside

Fitting and removal of the intermediate rings from inside

Fitting and removal of the intermediate rings from outside

Figure 13: Fitting and removal of the intermediate rings

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Documents

hopper figure

hopper p

hopper extension

base hopper

hopper series

hopper region

hopper models

loading hopper