MUS0330202
03/10/2014
VALCO MELTON S.L.U. Pol. Ind. Agustinos C/G 34 3116 0 ORCOYEN, NAVARRA
TEL: +34 948 321580 Fax: +34 948 326584 [email protected] www.valcomelton.com
105
8.4. REPAIRING THE PNEUMATIC PUMP UNIT:
The pump unit consists of a valve, a shifter valve, a pneumatic cylinder
and a double-acting hydraulic pump, equipped with a pressure
compensator to avoid a drop in flow rate that occurs when changing
pump direction, and to enable maximum uniformity in Hot-Melt flow
.
Before disassembling the hydraulic unit, put on goggles, gloves and
long sleeves to avoid possible burns from splashes of hot adhesive.
1. Warm the tank until the adhesive is melted.
2. Reduce the air pressure to zero.
3. Eliminate system pressure by releasing the guns manually
or by opening the bleed valve.
4. Disconnect the electricity.
5. Disconnect the regulator unit electrically and mechanically.
6. Loosen the two pump cover screws 1/4 turn and lift the
pump casing.
Cylinder unit
Hydraulic unit
