Zenith C-30HDG manual 30HDG Pump Operating Information, New Pumps, Pumping Tips

C-30HDG PUMP — OPERATING INFORMATION

WARNING - Hose Blockage Hazard

If you repeatedly pull the throttle all the way out and try to force your pump to push through blockages due to separation of material in the hose or manifold, you will soon have breakdowns and costly repairs which are not covered under warranty.

If a blockage occurs, find where it is and clear it before further pumping. DO NOT increase the engine speed to clear the blockage. Increasing the engine speed will only compound the problem.

WARNING - Moving The Pump On The Job Site

It will be necessary at times to move your pump from one job site location to another.Before moving the pump, make sure to pump the remaining concrete out of the hopper. Moving the pump with a full hopper of concrete can cause severe damage or breakage of the axle and axle springs, excess strain and pressure on the hub and bearing assembly.

New Pumps

Allnewpumpsare“waterpressuretested”atthefactorybefore shipment.This procedure permits a thorough inspection of the entire drive system and valving under simulated full load condi- tions.

Thepumpownercandothesamebyattachinganadaptorcouple to the end of the discharge cone; e.g., the use of a standard 2 in. pipe cap with a 3/8 in.hole drilled in the center, screwed on to the end of the hinged cone or reducer at the pump.

Fill the hopper with water after making sure that all sand and rock have been removed from the manifold. Operate the pump at full throttleandthe3/8in.diameterholerestrictionwillcreatesufficient back-pressuretomakeathoroughinspectionofallmovingparts.

Pumping Tips

1.The effects of heat and excessive time on concrete: Hot concrete,commonlyreferredtoasahotload,isconcretethat has been in the redi-mix truck in excess of 2 to 3 hours. On a hot day, this amount of time is even less. A brief explanation of why heat and time affect concrete:

Concrete starts setting by drying up through a chemical reaction.Thecatalysttothisreactionisheat. Whenpumping a hot load, it is important to remember that when you have to stoppumpingforanyreason,addwatertotheconcreteinthe hopper and hand mix and move concrete in the hose every 5 minutes. If the shut down time becomes too long, wash out immediately.

2.ADMIXTURES

Remixtures that are designed into the concrete mix by the redi-mix company or an architectural engineering company. Thissectionlistscommonadmixturesandabriefexplanation of their functions:

A.Pozzolith 300 – or the equivalent acts as a water retarderandalubricant.Onaleanmix,longpushes,stiff mixes, and vertical pushes, Pozzolith 300R helps pumpability.

B.MBVR – air entraining, acts as a lubricant.

C.Calcium Chloride – commonly referred to as C.C., is used as an accelerator. When pumping a load with calcium chloride, it is recommended that you wash out if the waiting time between delivery trucks becomes too long.

D.Super Plasticizers – acts as an accelerator.The concrete will look very wet after the super plasticizer is added, but will begin to set up very fast.Wash out immediately if you do not have a truck waiting. Super plasticizers are used mainly on commercial jobs.

E.RedLabel– actsasawaterretarderandanaccelerator. Red label will be used mainly on commercial jobs.

F.Fly Ash – is used to help increase the strength of the concreteanddecreasethecementcontentperyard.This is one of the most common admixtures used.

All admixtures will be shown on the redi-mix con- creteticket.Beforestartingthepumpingjob,askthe driveroftheredi-mixtrucktoseetheconcreteticket and note the admixtures that exist and take the proper action.

3.Whenpumpinglongdistanceorpumpingstiffmixes,youcan expectadropinvolumecomparedtoshorterlinesandwetter mixes due to the change in valve efficiency or cavitation.

4.Leaking manifold seals or hose coupling gaskets which leak watercancauseseparationandsubsequentjammingatthat point.

5.Damaged hoses with internal restrictions can cause block- ages.

PAGE 30 — MAYCO C-30HDG PUMP — OPERATION AND PARTS MANUAL — REV. #6 (04/02/12)