PART NO.: 6441-728A
3
REPAIR PROCEDURES: SERIES GRS DESIGN 2 [6] GRIPPERS
PHD, Inc. makes no warranty as to the fitness of its products or as to the length of service life after being repaired or parts replaced by anyone other than authorized
employees of PHD, Inc. In no event shall PHD, Inc. be liable for loss of profits, indirect, consequential, or incidental damages arising out of the use of PHD Products.
TABLE 1 - GRIPPER ASSEMBLY TORQUES
PART DESCRIPTION SIZE 19 SIZE 25 SIZE 27 SIZE 28 SIZE 32 SIZE 40 SIZE 50 SIZE 63
in-lb Nm in-lb Nm in-lb Nm in-lb Nm in-lb Nm in-lb Nm in-lb Nm in-lb Nm
JAW COVER
ASSEMBLY FASTENER 7 0.8 9 1.0 17 1.9 17 1.9 25 2.8 40 4.5 85 9.6 210 24
PISTON ASSEMBLY
FASTENER 15 1.7 17 1.9 17 1.9 17 1.9 25 2.8 75 8.5 85 9.6 210 24
MAGNET TARGET PIN
(STD UNIT) 20 in-oz 0.14 20 in-oz 0.14 20 in-oz 0.14 20 in-oz 0.14 20 in-oz 0.14 20 in-oz 0.14 20 in-oz 0.14 20 in-oz 0.14
PROX TARGET PIN
(CP OPTION ONLY) 40 in-oz 0.28 40 in-oz 0.28 40 in-oz 0.28 40 in-oz 0.28 40 in-oz 0.28 40 in-oz 0.28 9 1.0 9 1.0
8) Size 25-63 jaws: Assemble both jaws to jaw driver and move jaws to closed position. Verify that counterbore in jaw driver (see Figure 3)
is oriented to accept rod when assembled. Assemble jaw seals to jaws, when included. Note jaw orientation per Figure 1. Align jaw and
driver assembly with jaw slot. Slide jaw seals, when included, in line with jaw seal slots. Slide assembly down into jaw slot. Verify that
jaw seals are properly located in slot by checking that no gap exists between jaw and jaw slot.
9) Size 40, 50, and 63 with -FSR2 jaws (Figure 6): Apply threadlocker to male thread at end of piston rod and assemble into cam driver.
Assemble both jaws to jaw driver and move jaws to closed position. Assemble jaw seals to jaws. Note jaw orientation per Figure 1. Align
jaw, piston rod, and driver assembly with jaw slot. Align jaw seal slots with slots in body. Slide assembly down into jaw slot. Verify that
jaw seals are properly located in slot by checking that no gap exists between jaw and jaw slot.
10) Install air filters on size 40, 50, and 63 units.
11) Size 25-63 jaw cover: Care must be taken to align cover with jaw seals, when included. Verify that jaw seals are properly located in cover
by checking that no gap exists between jaw and jaw cover (prior to applying torque to cover fasteners). Apply removable threadlocker
sparingly to jaw cover assembly fasteners and install in body. Torque jaw cover assembly fasteners per TABLE 1.
12) Replace and lubricate piston seal.
13) Size 25-63 piston standard and -FSE2: Insert piston with seal into body of gripper, see Figures 3 and 7 for orientation.
Apply removable threadlocker to piston assembly fastener and assemble through piston and rod into jaw driver. Torque
piston assembly fastener per TABLE 1.
14) Size 25-63 piston with -FSR2: Lubricate and insert spring as shown in Figure 6. Apply removable threadlocker to piston assembly
fastener and assemble through piston and rod into jaw driver or piston rod (sizes 40, 50, and 63). Pressure may need to be applied to
piston to compress spring in units with -FSR2 option. Torque piston assembly fastener per TABLE 1.
15) -FSE2 spring: Lubricate and insert spring as shown in Figure 7.
16) Bore plug, seal, and retainer standard and -FSR2: Lubricate and install bore plug seal, see Figure 3 for orientation. NOTE: Plug seal
may require stretching prior to installation to allow proper assembly of bore plug. Size 19 plug seal installs into groove in piston. Install
bore plug retainer into body (sharp edges of retaining ring outward from body). Verify proper seating of retaining ring.
17) Bore plug, seal, retainer, and spring with -FSE2: Lubricate and install bore plug seal, see Figure 3 for orientation. NOTE: Plug seal may
require stretching prior to installation to allow proper assembly of bore plug. Center bore plug on spring. Compress spring by applying
pressure to center of bore plug. When compressing, verify proper seating of bore plug into body. While maintaining pressure, install bore
plug retainer into body (sharp edges of retaining ring outward from body). Verify proper seating of retaining ring.
18) Standard unit without -CP option: Apply removable threadlocker sparingly to thread on magnet target pin and install through target slot
in body into jaw (see Figure 2). Torque magnet target pin in jaw per TABLE 1.
19) Press magnet target assembly onto magnet target pin as shown in Figure 2 until target is approximately 0.040 in [1 mm] below sensor
slot surface.
20) Clean sensor slot surface (see Figure 2) to remove any grease or dirt. Carefully remove backing from aluminum sensor cover.
(WARNING: if cover becomes bent it will not adhere or seal properly.) Install sensor cover onto sensor slot surface with cover aligned
with edge as shown (size 19, 25, 27, 28, 40, and 50 per Figure 1). Center sensor cover over magnet target slot on size 32 and 63 and
install onto sensor slot cover surface. Press firmly along length of cover to remove air.
21) CP option: Apply removable threadlocker sparingly to prox target pin and install through body into jaw. Torque the prox target pin in jaw
per TABLE 1. For prox target mounting instructions see 6441-725.
22) GRF34-x-25 x 6.5 only: When installing replacement jaws, apply removable threadlocker to bearing plugs on size 25. Install bearing
plugs in body. See Figure 5 for orientation. Apply air to unit and cycle at 30 psi [2.1 bar] while tightening bearing plugs. Tighten plugs
until unit stops cycling, back-off screw until unit cycles freely. Allow threadlocker to cure before use of unit.
